feat(telemetry): Telemetry MVP

Implements the first version of telemetry.

- Created telemetry js package and added it to latitude's TS SDK.
- Telemetry supports automatic telemetry data collection for the following providers:
  - OpenAI
  - Anthropic
  - Azure AI
  - Cohere
  - Google Vertex AI
  - Google AI Platform
  - AWS Bedrock
  - Vercel SDK (and all its providers)
- Added backend to ingest traces and spans
- Added frontend to visualize traces and spans
- Added actions to automatically create prompts from spans
- Added manual tracing with SDK's telemetry.span() method
- Added automatic prompt log creation when a span is associated with a prompt

.tmuxinator.yml

@@ -1,6 +1,7 @@
 name: latitude-llm
 windows:
-  - web: cd apps/web
-  - apps: pnpm dev --filter='./apps/*' --filter='./packages/sdks/typescript' --filter='./packages/compiler'
+  - web: cd .
+  - apps: pnpm dev --filter='./apps/*'
+  - packages: pnpm dev --filter='./packages/*'
   - docker: docker compose up --menu=false
   - studio: cd packages/core && pnpm db:studio

apps/gateway/src/routes/api/v2/otlp/traces/handlers/otlp.test.ts

@@ -0,0 +1,300 @@
+import { Project, Workspace } from '@latitude-data/core/browser'
+import { unsafelyGetFirstApiKeyByWorkspaceId } from '@latitude-data/core/data-access'
+import { createProject } from '@latitude-data/core/factories'
+import app from '$/routes/app'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { otlpTraceHandler } from './otlp'
+import { setupJobs } from '@latitude-data/core/jobs'
+
+// Mock the jobs setup
+vi.mock('@latitude-data/core/jobs', () => ({
+  setupJobs: vi.fn(),
+}))
+
+describe('POST /api/v2/otlp/v1/traces', () => {
+  let workspace: Workspace
+  let project: Project
+  let route: string
+  let headers: Record<string, string>
+
+  beforeEach(async () => {
+    const setup = await createProject()
+    workspace = setup.workspace
+    project = setup.project
+
+    const apikey = await unsafelyGetFirstApiKeyByWorkspaceId({
+      workspaceId: workspace.id,
+    }).then((r) => r.unwrap())
+
+    route = '/api/v2/otlp/v1/traces'
+    headers = {
+      Authorization: `Bearer ${apikey.token}`,
+      'Content-Type': 'application/json',
+    }
+  })
+
+  const createBasicSpan = (traceId: string, spanId: string) => ({
+    traceId,
+    spanId,
+    name: 'test-span',
+    kind: 1,
+    startTimeUnixNano: (Date.now() * 1_000_000).toString(),
+    endTimeUnixNano: (Date.now() * 1_000_000 + 1_000_000_000).toString(),
+    attributes: [{ key: 'test.attribute', value: { stringValue: 'test' } }],
+    status: { code: 1, message: 'Success' },
+  })
+
+  const createOtlpRequest = (spans: any[]) => ({
+    projectId: project.id,
+    resourceSpans: [
+      {
+        resource: {
+          attributes: [
+            {
+              key: 'service.name',
+              value: { stringValue: 'test-service' },
+            },
+          ],
+        },
+        scopeSpans: [{ spans }],
+      },
+    ],
+  })
+
+  describe('when authorized', () => {
+    it('processes single span', async () => {
+      const span = createBasicSpan(
+        '12345678901234567890123456789012',
+        '1234567890123456',
+      )
+
+      const response = await app.request(route, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify(createOtlpRequest([span])),
+      })
+
+      expect(response.status).toBe(200)
+      expect(await response.json()).toEqual({ status: 'ok' })
+    })
+
+    it('handles batch of spans', async () => {
+      const spans = Array.from({ length: 10 }, (_, i) =>
+        createBasicSpan(
+          '12345678901234567890123456789012',
+          i.toString(16).padStart(16, '0'),
+        ),
+      )
+
+      const response = await app.request(route, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify(createOtlpRequest(spans)),
+      })
+
+      expect(response.status).toBe(200)
+      expect(await response.json()).toEqual({ status: 'ok' })
+    })
+
+    it('processes multiple traces', async () => {
+      const spans = Array.from({ length: 3 }, (_, i) =>
+        createBasicSpan(
+          `${'0'.repeat(29)}${(i + 1).toString().padStart(3, '0')}`,
+          i.toString(16).padStart(16, '0'),
+        ),
+      )
+
+      const response = await app.request(route, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify(createOtlpRequest(spans)),
+      })
+
+      expect(response.status).toBe(200)
+      expect(await response.json()).toEqual({ status: 'ok' })
+    })
+  })
+
+  describe('when unauthorized', () => {
+    it('returns 401 without auth token', async () => {
+      const response = await app.request(route, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ resourceSpans: [] }),
+      })
+
+      expect(response.status).toBe(401)
+    })
+  })
+})
+
+describe('otlpTraceHandler', () => {
+  const mockQueue = {
+    jobs: {
+      enqueueProcessOtlpTracesJob: vi.fn(),
+    },
+  }
+
+  beforeEach(() => {
+    vi.clearAllMocks()
+    ;(setupJobs as any).mockResolvedValue({
+      defaultQueue: mockQueue,
+    })
+  })
+
+  it('should process and enqueue spans in batches', async () => {
+    // Create test data with multiple spans
+    const testData = {
+      resourceSpans: [
+        {
+          resource: {
+            attributes: [
+              {
+                key: 'service.name',
+                value: { stringValue: 'test-service' },
+              },
+            ],
+          },
+          scopeSpans: [
+            {
+              spans: Array.from({ length: 75 }, (_, i) => ({
+                traceId: `trace-${i}`,
+                spanId: `span-${i}`,
+                name: `span-${i}`,
+                kind: 1,
+                startTimeUnixNano: '1234567890',
+              })),
+            },
+          ],
+        },
+      ],
+    }
+
+    const mockContext = {
+      req: {
+        valid: () => testData,
+      },
+      get: () => ({ id: 'test-workspace' }),
+      json: vi.fn(),
+    }
+
+    await otlpTraceHandler(mockContext as any)
+
+    // With BATCH_SIZE = 50, we expect 2 batches (50 + 25 spans)
+    expect(mockQueue.jobs.enqueueProcessOtlpTracesJob).toHaveBeenCalledTimes(2)
+
+    // Check first batch
+    expect(mockQueue.jobs.enqueueProcessOtlpTracesJob).toHaveBeenCalledWith({
+      spans: expect.arrayContaining([
+        expect.objectContaining({
+          span: expect.objectContaining({ spanId: 'span-0' }),
+          resourceAttributes: expect.arrayContaining([
+            expect.objectContaining({
+              key: 'service.name',
+              value: { stringValue: 'test-service' },
+            }),
+          ]),
+        }),
+      ]),
+      workspace: { id: 'test-workspace' },
+    })
+
+    // Verify response
+    expect(mockContext.json).toHaveBeenCalledWith({ status: 'ok' })
+  })
+
+  it('should handle empty spans array', async () => {
+    const testData = {
+      resourceSpans: [
+        {
+          resource: {
+            attributes: [],
+          },
+          scopeSpans: [
+            {
+              spans: [],
+            },
+          ],
+        },
+      ],
+    }
+
+    const mockContext = {
+      req: {
+        valid: () => testData,
+      },
+      get: () => ({ id: 'test-workspace' }),
+      json: vi.fn(),
+    }
+
+    await otlpTraceHandler(mockContext as any)
+
+    expect(mockQueue.jobs.enqueueProcessOtlpTracesJob).not.toHaveBeenCalled()
+    expect(mockContext.json).toHaveBeenCalledWith({ status: 'ok' })
+  })
+
+  it('should preserve resource attributes for each span', async () => {
+    const testData = {
+      resourceSpans: [
+        {
+          resource: {
+            attributes: [
+              {
+                key: 'service.name',
+                value: { stringValue: 'test-service' },
+              },
+              {
+                key: 'deployment.environment',
+                value: { stringValue: 'production' },
+              },
+            ],
+          },
+          scopeSpans: [
+            {
+              spans: [
+                {
+                  traceId: 'trace-1',
+                  spanId: 'span-1',
+                  name: 'test-span',
+                  kind: 1,
+                  startTimeUnixNano: '1234567890',
+                },
+              ],
+            },
+          ],
+        },
+      ],
+    }
+
+    const mockContext = {
+      req: {
+        valid: () => testData,
+      },
+      get: () => ({ id: 'test-workspace' }),
+      json: vi.fn(),
+    }
+
+    await otlpTraceHandler(mockContext as any)
+
+    expect(mockQueue.jobs.enqueueProcessOtlpTracesJob).toHaveBeenCalledWith({
+      spans: [
+        {
+          span: expect.objectContaining({
+            spanId: 'span-1',
+          }),
+          resourceAttributes: expect.arrayContaining([
+            expect.objectContaining({
+              key: 'service.name',
+              value: { stringValue: 'test-service' },
+            }),
+            expect.objectContaining({
+              key: 'deployment.environment',
+              value: { stringValue: 'production' },
+            }),
+          ]),
+        },
+      ],
+      workspace: { id: 'test-workspace' },
+    })
+  })
+})