Initial WhaleTown V2 backend

.gitignore

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+# Dependencies and build output
+node_modules/
+dist/
+build/
+coverage/
+.nyc_output/
+*.tsbuildinfo
+**/*.spec.ts
+**/*test.base.ts
+**/*_example.ts
+test/
+jest.config.js
+test-setup.js
+
+# Runtime configuration and credentials
+.env
+.env.*
+!.env.example
+!.env.production.example
+client/.env*
+!client/.env.example
+*.pem
+*.key
+*.p12
+*.pfx
+*credentials*
+*secrets*
+
+# Runtime data
+logs/
+generated/
+redis-data/
+uploads/
+*.log
+*.log.gz
+*.sqlite
+*.sqlite3
+*.db
+*.dump
+*.bak
+
+# Local configuration and tooling
+config/
+docs/
+.cache/
+.tmp/
+tmp/
+.venv/
+venv/
+__pycache__/
+*.py[cod]
+.vscode/
+.idea/
+.kiro/
+.claude/
+scripts/skin_generation/references/backup/
+scripts/skin_generation/tests/
+
+# Operating system and editor files
+.DS_Store
+Thumbs.db
+*.swp
+*.swo
+*~