Add Performance Benchmarks

[Carrington-dev]

Description

Create performance benchmarks and optimization tests.

Tasks

• Create benchmark suite
• Benchmark file loading performance
• Benchmark caching effectiveness
• Benchmark type casting overhead
• Benchmark cloud provider calls
• Add benchmark CI workflow
• Track performance over time
• Document performance characteristics
• Identify optimization opportunities

Acceptance Criteria

• Benchmarks reliable and reproducible
• Performance tracked over time
• Bottlenecks identified
• Optimizations documented