chore: PostgreSQL migration compatibility and infrastructure improvements

Database & Migrations:
- Update all Alembic migrations for PostgreSQL compatibility
- Remove SQLite-specific syntax (AUTOINCREMENT, etc.)
- Add database utility helpers for PostgreSQL operations
- Fix services to use PostgreSQL-compatible queries

Documentation:
- Add comprehensive Docker deployment guide
- Add production deployment documentation
- Add infrastructure architecture documentation
- Update database setup guide for PostgreSQL-only
- Expand troubleshooting guide

Architecture & Validation:
- Add migration.yaml rules for SQL compatibility checking
- Enhance validate_architecture.py with migration validation
- Update architecture rules to validate Alembic migrations

Development:
- Fix duplicate install-all target in Makefile
- Add Celery/Redis validation to install.py script
- Add docker-compose.test.yml for CI testing
- Add squash_migrations.py utility script
- Update tests for PostgreSQL compatibility
- Improve test fixtures in conftest.py

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

alembic/versions/n2c3d4e5f6a7_add_features_table.py

@@ -255,7 +255,7 @@ def upgrade() -> None:
                 INSERT INTO features (code, name, description, category, ui_location, ui_icon, ui_route,
                                       minimum_tier_id, is_active, is_visible, display_order, created_at, updated_at)
                 VALUES (:code, :name, :description, :category, :ui_location, :ui_icon, :ui_route,
-                        :minimum_tier_id, 1, 1, :display_order, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+                        :minimum_tier_id, true, true, :display_order, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
             """),
             {
                 "code": code,