Consolidate database structure by removing duplicate category files

[Copilot]

This PR implements a centralized database approach by consolidating duplicate category-related files that were causing inconsistency in the codebase.

Problem

The repository contained duplicate category files with both correct spelling ("category") and incorrect spelling ("catagory"):

• src/controllers/catagory.controller.ts (duplicate)
• src/services/catagory.service.ts (duplicate)
• src/routes/catagory.route.ts (duplicate)
• CATAGORY_API.md (misspelled filename)

This violated the principle of having "one-centralized DB" as these duplicates could lead to:

• Confusion about which files to modify
• Inconsistent behavior if the wrong files were updated
• Import errors and maintenance overhead
• Fragmented database logic

Solution

Removed duplicate files:

• Deleted all misspelled "catagory" service, controller, and route files
• These files were not being imported anywhere in the codebase

Renamed documentation:

• CATAGORY_API.md → CATEGORY_API.md for consistency

Verified centralization:

• Confirmed single Prisma schema serves as the centralized database definition
• All imports in index.ts correctly reference the consolidated category files
• TypeScript compilation passes without errors
• No orphaned references or broken imports

Result

The database structure is now properly centralized with:

• Single source of truth for all category-related functionality
• Consistent naming conventions throughout the codebase
• Clean, maintainable architecture with no duplicate modules
• All database relationships properly defined in one central schema

Fixes #13.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• binaries.prisma.sh
  • Triggering command: node scripts/postinstall.js (dns block)
  • Triggering command: node /home/REDACTED/work/backend/backend/node_modules/.bin/prisma -v (dns block)
  • Triggering command: node /home/REDACTED/work/backend/backend/node_modules/.bin/prisma generate (dns block)
• checkpoint.prisma.io
  • Triggering command: /usr/local/bin/node /home/REDACTED/work/backend/backend/node_modules/prisma/build/child {"product":"prisma","version":"6.12.0","cli_install_type":"local","information":"","local_timestamp":"2025-08-16T16:40:33Z","project_hash":"cb50a275","cli_path":"/home/REDACTED/work/backend/backend/node_modules/.bin/prisma","cli_path_hash":"fdbaad87","endpoint":"REDACTED","disable":false,"arch":"x64","os":"linux","node_version":"v20.19.4","ci":true,"ci_name":"GitHub Actions","command":"generate","schema_providers":["postgresql"],"schema_preview_features":[],"schema_generators_providers":["prisma-client-js"],"cache_file":"/home/REDACTED/.cache/checkpoint-nodejs/prisma-fdbaad87","cache_duration":43200000,"remind_duration":172800000,"force":false,"timeout":5000,"unref":true,"child_path":"/home/REDACTED/work/backend/backend/node_modules/prisma/build/child","client_event_id":"","previous_client_event_id":"","check_if_update_available":true} (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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