Feat/implement caching layer

[stenwire]

feat: Add Redis caching for performance for issue #26

This commit introduces Redis caching to improve the application's performance by caching frequently accessed data.

Key changes include:

• A new RedisService to handle all Redis-related operations, including getting/setting data, clearing the cache, and retrieving statistics.
• Integration of the RedisService into the APIConfAgent, csv_schedule_tools, and web_scraping_service.
• Caching of agent responses in the APIConfAgent.chat method.
• Caching of the conference schedule data in the _load_csv_data function.
• Replacement of the file-based cache in the web_scraping_service with Redis.
• Implementation of time-based (TTL) and manual cache invalidation.
• A new protected endpoint for monitoring cache metrics.
• Addition of fakeredis and pytest-mock for testing.
• Unit tests for the RedisService and RedisRouter logic.

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Some nice-to-haves additions in this PR:

• Makefile to centralize commands, for reference.
• Docker redis service if not running locally
• Added Volumes for:

  ./app:/app/app
  ./tests:/app/tests
  ./scripts:/app/scripts
  ./main.py:/app/main.py
  ./pyproject.toml:/app/pyproject.toml
  ./poetry.lock:/app/poetry.lock

So that changes accross those folders would reflect on the docker container.