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>

docs/deployment/index.md

@@ -2,13 +2,24 @@
 
 This guide covers deploying the Wizamart platform to production environments.
 
+!!! tip "New to deployment?"
+    Start with the [Infrastructure Guide](infrastructure.md) for a complete overview of architecture options.
+
+## Deployment Options
+
+| Option | Best For | Guide |
+|--------|----------|-------|
+| **Traditional VPS** | Direct server access, debugging | [Production Guide](production.md) |
+| **Docker Compose** | Consistent environments, easy rollbacks | [Docker Guide](docker.md) |
+| **Managed Services** | Minimal ops, small teams | See [Infrastructure Guide](infrastructure.md#option-3-managed-services-minimal-ops) |
+
 ## Prerequisites
 
 - Python 3.11+
-- PostgreSQL 14+ (production) or SQLite (development)
-- Redis (optional, for caching/sessions)
+- PostgreSQL 15+ (required - SQLite not supported)
+- Redis (required for Celery background jobs)
+- Docker (for development database)
 - Tailwind CSS CLI (standalone binary)
-- uv package manager
 
 ## Environment Configuration