[Feature] Implement Analysis Caching to Optimize Performance

[Anushka-Pote]

Is your feature request related to a problem? Please describe.
Currently, the API processes PDF files and performs analysis each time a user uploads them, even if the files are identical.

Describe the solution you'd like
To improve performance and reduce computation time, we should implement a caching mechanism. This will store analysis results temporarily and return cached results for repeated uploads of the same files.

Expected Outcome
Implement a caching mechanism that checks if a resume and job description pair has been previously analyzed.
If a match is found in the cache, return the cached result.
If not, perform the analysis, store the result in the cache, and then return it to the user.

Additional context
Will need to use some caching python library or a dictionary for this feature