Ensure that offset and limit are never negative

And set minimum limit consistently to 1 ... 0 doesn't seem to have much
utility but would also be an option.

Fixes part of #18043.

lib/galaxy/webapps/galaxy/api/folder_contents.py

@@ -36,10 +36,11 @@
     Path(..., title="Folder ID", description="The encoded identifier of the library folder."),
 ]
 
-LimitQueryParam: int = Query(default=10, title="Limit", description="Maximum number of contents to return.")
+LimitQueryParam: int = Query(default=10, ge=1, title="Limit", description="Maximum number of contents to return.")
 
 OffsetQueryParam: int = Query(
     default=0,
+    ge=0,
     title="Offset",
     description="Return contents from this specified position. For example, if ``limit`` is set to 100 and ``offset`` to 200, contents between position 200-299 will be returned.",
 )

lib/galaxy/webapps/galaxy/api/jobs.py

@@ -161,10 +161,11 @@
     description="Sort results by specified field.",
 )
 
-LimitQueryParam: int = Query(default=500, title="Limit", description="Maximum number of jobs to return.")
+LimitQueryParam: int = Query(default=500, ge=1, title="Limit", description="Maximum number of jobs to return.")
 
 OffsetQueryParam: int = Query(
     default=0,
+    ge=0,
     title="Offset",
     description="Return jobs starting from this specified position. For example, if ``limit`` is set to 100 and ``offset`` to 200, jobs 200-299 will be returned.",
 )

lib/galaxy/webapps/galaxy/api/pages.py

@@ -72,10 +72,11 @@
     description="Sort in descending order?",
 )
 
-LimitQueryParam: int = Query(default=100, lt=1000, title="Limit number of queries.")
+LimitQueryParam: int = Query(default=100, ge=1, lt=1000, title="Limit number of queries.")
 
 OffsetQueryParam: int = Query(
     default=0,
+    ge=0,
     title="Number of pages to skip in sorted query (to enable pagination).",
 )
 

lib/galaxy/webapps/galaxy/api/workflows.py

@@ -815,10 +815,11 @@ def __get_stored_workflow(self, trans, workflow_id, **kwd):
     description="Sort in descending order?",
 )
 
-LimitQueryParam: Optional[int] = Query(default=None, title="Limit number of queries.")
+LimitQueryParam: Optional[int] = Query(default=None, ge=1, title="Limit number of queries.")
 
 OffsetQueryParam: Optional[int] = Query(
     default=0,
+    ge=0,
     title="Number of workflows to skip in sorted query (to enable pagination).",
 )
 
@@ -1229,6 +1230,7 @@ def show_workflow(
 InvocationsLimitQueryParam = Annotated[
     Optional[int],
     Query(
+        ge=1,
         title="Limit",
         description="Limit the number of invocations to return.",
     ),
@@ -1237,6 +1239,7 @@ def show_workflow(
 InvocationsOffsetQueryParam = Annotated[
     Optional[int],
     Query(
+        ge=0,
         title="Offset",
         description="Number of invocations to skip.",
     ),