chore: Remove obsolete microservices directories and update all references

- Delete data-entry-app/ (1.6GB), reports-app/ (447MB), .auto-build-data/
- Saved ~1.4GB disk space (64% reduction: 2.2GB → 845MB)

Updated references across 38 files:
- .claude/rules/ paths: backend/modules/, src/modules/
- .claude/commands/validate.md: all validation paths
- docs/ (13 files): data-entry, telegram, README, CLAUDE.md
- scripts/ (3 files): backup-secrets, restore-secrets, test-docker
- security/ (2 files): git_cleanup, SECURITY_PROCEDURES
- deployment/ & shared/: updated all stale comments

All paths now reflect ultrathin monolith architecture:
- Backend: backend/modules/{reports,data_entry,telegram}/
- Frontend: src/modules/{reports,data-entry}/
- Shared: shared/{auth,database,routes}/

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

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

shared/routes/__init__.py

@@ -2,7 +2,7 @@
 Shared Routes for ROA2WEB Applications
 
 This module provides factory functions for creating common API routers
-that can be mounted in both reports-app and data-entry-app.
+that can be mounted in both the unified monolith backend.
 
 Usage:
     from shared.routes import create_companies_router, create_calendar_router

shared/routes/calendar.py

@@ -2,7 +2,7 @@
 Shared Calendar Router Factory for ROA2WEB Applications
 
 Creates a FastAPI router for /api/calendar endpoints that can be used
-by both reports-app and data-entry-app.
+by both the unified monolith backend.
 
 Usage:
     from shared.routes.calendar import create_calendar_router

shared/routes/companies.py

@@ -2,7 +2,7 @@
 Shared Companies Router Factory for ROA2WEB Applications
 
 Creates a FastAPI router for /api/companies endpoints that can be used
-by both reports-app and data-entry-app.
+by both the unified monolith backend.
 
 Usage:
     from shared.routes.companies import create_companies_router