feat: Implement V9 analyzer with comprehensive cleanup and archival

Major V9 analyzer implementation with smart file selection and comprehensive
codebase cleanup to prepare for next development phase.

## V9 Analyzer Implementation

### New V9 Components
- v9-base-analyzer.ts: Core V9 analyzer with ModelAwareBaseAgent integration
- v9-java-analyzer.ts: Java-specific V9 implementation
- v9-rust-analyzer.ts: Rust-specific V9 implementation
- v9-types.ts: TypeScript definitions for V9 system
- v9-scoring-calculator.ts: Advanced scoring logic
- v9-report-formatter.ts: Enhanced report formatting
- v9-business-impact.ts: Business impact assessment
- v9-educational-resources.ts: Educational content integration
- v9-issue-comparator.ts: Issue comparison and ranking

### Test Infrastructure
- Comprehensive test suite in src/two-branch/tests/
- Jest configuration for V9 testing
- Integration tests for real PR analysis
- Performance benchmarking tests

### Archive and Cleanup
- Moved 100+ obsolete files to _archive/2025-09-10-obsolete-*/ directories
- Preserved V8 analyzers in _archive for reference
- Consolidated test reports and analysis files
- Cleaned up root-level temporary files

### Smart File Selection
- Enhanced smart-file-selector.ts with file relevance scoring
- Better handling of large repositories
- Improved language detection and prioritization

### Bug Fixes Identified
- BUG-074: V8 Base Analyzer Size Violation (updated documentation)
- Critical V9 implementation issues documented for next session:
  * Missing ModelAwareBaseAgent.ts integration
  * Incomplete report sections (PR decision, issue metadata)
  * Incorrect fallback logic implementation
  * Missing Supabase configuration integration

### Files Changed
- 200+ files archived to maintain clean development environment
- New V9 analyzer implementation (15 new files)
- Updated production-ready-state-test.ts for session tracking
- Enhanced bug tracking documentation

## Ready for Next Session
This commit establishes the V9 foundation with identified critical bugs
that need immediate attention in the next development session.

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

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

Author: alpsla