feat: Major improvements toward production readiness

This commit adds significant enhancements to DriftDB, bringing it closer
to production readiness (though not fully production-ready yet):

## Core Improvements:
- Transaction buffering system for ROLLBACK support
- Ordered column system to fix HashMap ordering issues
- Comprehensive error handling with structured errors
- Native TLS/SSL support with PostgreSQL SSL negotiation

## Performance & Monitoring:
- Advanced performance monitoring with query optimization
- Intelligent connection pool management with ML-based health prediction
- 20+ HTTP monitoring endpoints for observability
- Resource optimization with automatic memory/CPU management

## Security:
- Enhanced SQL injection prevention
- Rate limiting and DDoS protection
- Multiple authentication methods (MD5, SCRAM-SHA-256)
- Audit logging infrastructure

## Testing & Documentation:
- Integration test framework for production scenarios
- Comprehensive deployment documentation
- Performance benchmarking tools

Note: While these improvements are substantial, DriftDB is still in
alpha and requires further testing and refinement before production use.

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

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

Author: DavidLiedle

Cargo.lock

@@ -20,6 +20,7 @@ tracing = { workspace = true }
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 serde = { workspace = true }
 serde_json = { workspace = true }
+thiserror = "1.0"
 clap = { version = "4", features = ["derive", "env"] }
 uuid = { workspace = true }
 md5 = "0.7"
@@ -44,6 +45,10 @@ lazy_static = "1.4"
 chrono = { version = "0.4", features = ["serde"] }
 sysinfo = "0.30"
 sqlparser = "0.51"
+# TLS support
+tokio-rustls = "0.25"
+rustls = "0.22"
+rustls-pemfile = "2.0"
 
 [dev-dependencies]
 tempfile = { workspace = true }