Metrics collector - tool calls and requests

[EugeneLightsOn]

Metrics collector

AI Description

This pull request introduces a new metrics system to the backend, enabling the collection and export of metrics data. The changes include:

• Adding a new metrics directory to the .gitignore file.
• Mounting the metrics directory in docker-compose.yml.
• Modifying the CMD command in src/backend/Dockerfile to specify the port number as 8000.
• Creating a new MetricsSettings class in src/backend/config/settings.py for managing metrics-related settings.
• Importing RequestMetricsMiddleware and collector from backend.metrics in src/backend/main.py.
• Adding a new backend.metrics module with several new files:
  • __init__.py: Imports RequestMetricsMiddleware, collector, MONITORED_PATHS, and track_tool_call_time from the backend.metrics package.
  • middleware.py: Defines the RequestMetricsMiddleware class for handling metrics collection and the MetricsCollector class for managing metrics data.
  • tool_call_decorator.py: Implements the track_tool_call_time decorator for tracking method execution time and logging it to the metrics collector.
• Importing track_tool_call_time from backend.metrics in src/backend/tools/base.py and using it to decorate methods with the metrics collector and parameter checker.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 48.52941% with 35 lines in your changes missing coverage. Please review.

Project coverage is 79.77%. Comparing base (83cd749) to head (e040b3b).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/backend/metrics/middleware.py	44.11%	19 Missing ⚠️
src/backend/metrics/tool_call_decorator.py	25.00%	12 Missing ⚠️
src/backend/main.py	50.00%	3 Missing ⚠️
src/backend/tools/base.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #934      +/-   ##
==========================================
- Coverage   79.95%   79.77%   -0.19%     
==========================================
  Files         292      295       +3     
  Lines       11898    11965      +67     
==========================================
+ Hits         9513     9545      +32     
- Misses       2385     2420      +35     

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[ezawadski]

Would it be better if we wrote to the file in real time? Instead of having to stop the app to get the metric data?