Enhance exception handling, caching, and CORS in QuoteService

[WillianSilva51]

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[Copilot]

Pull request overview

This PR updates the Quotes API/service layer to improve domain validation and exception handling, adjusts Redis cache key generation behavior, adds global CORS middleware configuration, and moves test/lint tooling into a dev optional dependency group.

Changes:

• Add duplicate-quote validation in QuoteService.create_quote() backed by a new repository lookup method and corresponding tests.
• Restructure exception modules/handlers under api/core/* and improve unexpected exception logging.
• Split dev tools into project.optional-dependencies.dev and update CI to install them via uv sync --extra dev.

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
uv.lock	Moves pytest/ruff into an optional dev extra in the lock metadata.
pyproject.toml	Defines [project.optional-dependencies].dev for test/lint dependencies.
api/tests/test_quote_service.py	Adds tests/fixtures for duplicate detection; introduces a placeholder get_all test.
api/services/quote_service.py	Adds duplicate check + fixes tags filter construction for get_all.
api/routers/quotes.py	Tightens API key dependency typing.
api/repositories/quote_repository.py	Uses model_validate on create; adds get_quote_by_content_and_author.
api/main.py	Switches exception imports to core.* and adds global CORS middleware.
api/exceptions/__init__.py	Removes old exceptions package exports.
api/core/handlers/exception_handlers.py	Updates imports and logs unexpected exceptions with stack traces via Loguru.
api/core/handlers/__init__.py	Adds package export for handlers.
api/core/exceptions/custom_exceptions.py	Ensures exceptions call super().__init__ for proper message behavior.
api/core/exceptions/__init__.py	Adds package export for exceptions.
api/core/cache.py	Filters cache key kwargs and caches falsy-but-not-None results.
.github/workflows/python-tests.yml	Installs dev extras in CI with uv.

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