LVT-72: Refactor endpoints into routes

[jackattack-4]

Implements routers to replace index.ts. Improves readability and maintainability. Also removed files that we weren't using to declutter the project.

[Copilot]

Pull request overview

This PR refactors the backend API from a monolithic src/index.ts file into a modular route-based structure, improving code organization and maintainability. The refactor introduces TypeScript path aliases for cleaner imports and separates application setup from server initialization.

Key Changes

• Reorganized all API endpoints into dedicated route modules grouped by domain (manager, slack, analysis)
• Introduced TypeScript path aliases (@/src/*) to replace relative imports throughout the codebase
• Split application setup (src/app.ts) from server initialization (src/server.ts)

Reviewed changes

Copilot reviewed 142 out of 146 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tsconfig.json	Added path aliases configuration for @/src/* imports
package.json	Updated entry points from index.ts/js to server.ts/js
src/app.ts	New file: Express app configuration and middleware setup
src/server.ts	New file: Server initialization with scheduled jobs and migrations
src/routes/	New route modules organizing endpoints by domain (manager, slack, analysis)
src/routes/index.ts	Main router combining all sub-routers with /v1 prefix
Various handler files	Updated all imports to use new path alias pattern
src/index.ts	Removed (replaced by app.ts and server.ts)

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[Copilot]

Pull request overview

Copilot reviewed 99 out of 102 changed files in this pull request and generated 3 comments.

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