Add CRUD endpoints for games API

[Copilot]

This PR implements the missing CRUD (Create, Read, Update, Delete) endpoints for the games API to support game submission and editing functionality. The design team needed these endpoints for UX development and acceptance testing.

New Endpoints Added

POST /api/games

Creates a new game with the following:

• Required fields: title, description, publisher_id, category_id
• Optional fields: star_rating
• Returns: 201 with created game data
• Validation: Ensures publisher and category references exist

PUT /api/games/

Updates an existing game with partial update support:

• Accepts: Any combination of game fields
• Returns: 200 with updated game data, 404 if game not found
• Validation: Validates foreign key references when provided

DELETE /api/games/

Deletes a game:

• Returns: 200 with success message, 404 if game not found
• Effect: Permanently removes game from database

Error Handling

All endpoints include comprehensive error handling:

• 400 Bad Request: Missing/invalid data, validation failures
• 404 Not Found: Game, publisher, or category doesn't exist
• 500 Server Error: Unexpected database/system errors
• Database transaction rollback on errors

Testing

Added 12 comprehensive test cases covering:

• Success scenarios for all CRUD operations
• Error scenarios (missing data, invalid IDs, not found)
• Input validation and edge cases
• All 16 tests pass (4 existing + 12 new)

Implementation Details

• Follows existing Flask blueprint patterns with proper type hints
• Uses centralized get_games_base_query() for consistent data loading
• Maintains existing JSON response structure with to_dict() method
• Proper HTTP status codes and meaningful error messages

The API is now ready for the design team to begin UX development and testing!

Fixes #8.

Warning

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• telemetry.astro.build
  • Triggering command: node /home/REDACTED/work/agents_tutorial1/agents_tutorial1/client/node_modules/.bin/astro dev --no-clearScreen (dns block)

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