spec: ultrathin-monolith - unificare 3 backends într-un singur proces

Transformare arhitecturală de la 3 backend-uri separate la monolith ULTRATHIN:
- 1 singur proces FastAPI (port 8000) în loc de 3 (8001, 8003, 8002)
- Telegram bot integrat în același proces (nu separat)
- Structură modulară păstrată: backend/modules/{reports,data-entry,telegram}/
- Log-uri unificate cu prefixe de modul
- Deploy Windows simplificat: 1 serviciu NSSM în loc de 3
- Startup paralel: Oracle pool + PaddleOCR
- Curățenie cod: eliminare duplicări, cod mort
- URL-uri API păstrate: /api/reports/*, /api/data-entry/*, /api/telegram/*

Estimare: 21-31 ore (3-4 zile)
Fișiere afectate: ~70 (10 critice)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.auto-build/specs/ultrathin-monolith/status.json

@@ -0,0 +1,121 @@
+{
+  "feature": "ultrathin-monolith",
+  "status": "spec_created",
+  "created_at": "2025-12-24T00:00:00Z",
+  "updated_at": "2025-12-24T00:00:00Z",
+  "spec_version": "1.0",
+  "complexity": "high",
+  "estimated_hours": "21-31",
+  "estimated_days": "3-4",
+  "key_changes": [
+    "Single backend entry point (backend/main.py) replacing 3 separate main.py files",
+    "Module-based directory structure (backend/modules/reports, backend/modules/data-entry, backend/modules/telegram)",
+    "API URL changes with module prefixes (/api/reports/*, /api/data-entry/*, /api/telegram/*)",
+    "Telegram bot integrated into main process (background task)",
+    "Parallel initialization (Oracle pool + PaddleOCR)",
+    "Unified logging with module prefixes",
+    "Single virtual environment with merged dependencies",
+    "Single Windows service for deployment (instead of 3)"
+  ],
+  "modules_affected": [
+    "reports-app/backend",
+    "data-entry-app/backend",
+    "reports-app/telegram-bot",
+    "frontend (vite.config.js, web.config)",
+    "shared/database",
+    "shared/auth",
+    "deployment/windows"
+  ],
+  "files_to_create": [
+    "/backend/main.py",
+    "/backend/config.py",
+    "/backend/requirements.txt",
+    "/backend/.env.example",
+    "/backend/modules/__init__.py",
+    "/backend/modules/reports/__init__.py",
+    "/backend/modules/data-entry/__init__.py",
+    "/backend/modules/telegram/__init__.py"
+  ],
+  "files_to_move": [
+    "reports-app/backend/app/routers/* -> backend/modules/reports/routers/",
+    "reports-app/backend/app/services/* -> backend/modules/reports/services/",
+    "reports-app/backend/app/models/* -> backend/modules/reports/models/",
+    "reports-app/backend/app/cache/* -> backend/modules/reports/cache/",
+    "data-entry-app/backend/app/routers/* -> backend/modules/data-entry/routers/",
+    "data-entry-app/backend/app/services/* -> backend/modules/data-entry/services/",
+    "data-entry-app/backend/app/db/* -> backend/modules/data-entry/db/",
+    "data-entry-app/backend/migrations/* -> backend/modules/data-entry/migrations/",
+    "reports-app/telegram-bot/app/bot/* -> backend/modules/telegram/bot/",
+    "reports-app/telegram-bot/app/db/* -> backend/modules/telegram/db/"
+  ],
+  "critical_files": [
+    "/backend/main.py (NEW - single entry point)",
+    "/backend/config.py (NEW - unified configuration)",
+    "/frontend/vite.config.js (UPDATE - single proxy)",
+    "/frontend/public/web.config (UPDATE - single IIS rule)",
+    "reports-app/backend/app/main.py (MIGRATE to unified)",
+    "data-entry-app/backend/app/main.py (MIGRATE to unified)",
+    "reports-app/telegram-bot/app/main.py (MIGRATE to unified)",
+    "shared/database/oracle_pool.py (VERIFY singleton)",
+    "/deployment/windows/install-service.ps1 (UPDATE single service)",
+    "/start-dev.sh (SIMPLIFY single process)"
+  ],
+  "risks": [
+    {
+      "risk": "Import path issues after moving files",
+      "likelihood": "high",
+      "impact": "medium",
+      "mitigation": "Use absolute imports, update systematically"
+    },
+    {
+      "risk": "Telegram bot blocks main thread",
+      "likelihood": "medium",
+      "impact": "high",
+      "mitigation": "Run in background task with asyncio.create_task()"
+    },
+    {
+      "risk": "Windows service migration breaks deployment",
+      "likelihood": "medium",
+      "impact": "high",
+      "mitigation": "Create new service, test thoroughly, document rollback"
+    },
+    {
+      "risk": "Frontend cache issues with URL changes",
+      "likelihood": "medium",
+      "impact": "low",
+      "mitigation": "Clear browser cache, cache-busting headers"
+    }
+  ],
+  "acceptance_criteria_count": 14,
+  "out_of_scope_count": 10,
+  "dependencies": [
+    "Frontend unified app (already completed)",
+    "SSH tunnel (unchanged)",
+    "Oracle database (unchanged)",
+    "Shared modules (auth, database, routes) - unchanged"
+  ],
+  "testing_strategy": [
+    "Module-by-module verification during migration",
+    "Integration testing after all modules migrated",
+    "Frontend connectivity testing",
+    "Telegram bot functionality testing",
+    "Performance testing (startup time, memory usage)",
+    "Windows deployment testing"
+  ],
+  "migration_approach": "big_bang",
+  "migration_notes": "Create new structure alongside old, copy files, update imports, test thoroughly, then archive old directories after verification",
+  "next_steps": [
+    "Review and approve specification",
+    "Create backend/ directory structure",
+    "Copy files to new structure (keep old as backup)",
+    "Update imports module by module",
+    "Create unified main.py",
+    "Test module routers independently",
+    "Integrate Telegram bot",
+    "Update frontend configuration",
+    "Full integration testing",
+    "Update deployment scripts",
+    "Update documentation",
+    "Archive old backend directories"
+  ]
+}