feat: create v2-prep branch with comprehensive planning

Restructured project for V2 refactor:

**Structure Changes:**
- Moved all V1 code to orig/ folder (preserved with git mv)
- Created docs/planning/ directory
- Added orig/README_V1.md explaining V1 preservation

**Planning Documents:**
- 00_V2_MASTER_PLAN.md: Complete architecture overview
  - Executive summary of critical V1 issues
  - High-level component architecture diagrams
  - 5-phase implementation roadmap
  - Success metrics and risk mitigation

- 07_TASK_BREAKDOWN.md: Atomic task breakdown
  - 99+ hours of detailed tasks
  - Every task < 2 hours (atomic)
  - Clear dependencies and success criteria
  - Organized by implementation phase

**V2 Key Improvements:**
- Per-exchange parsers (factory pattern)
- Multi-layer strict validation
- Multi-index pool cache
- Background validation pipeline
- Comprehensive observability

**Critical Issues Addressed:**
- Zero address tokens (strict validation + cache enrichment)
- Parsing accuracy (protocol-specific parsers)
- No audit trail (background validation channel)
- Inefficient lookups (multi-index cache)
- Stats disconnection (event-driven metrics)

Next Steps:
1. Review planning documents
2. Begin Phase 1: Foundation (P1-001 through P1-010)
3. Implement parsers in Phase 2
4. Build cache system in Phase 3
5. Add validation pipeline in Phase 4
6. Migrate and test in Phase 5

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

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

tests/calculation-validation/extracted/profit_values.txt

@@ -0,0 +1,11 @@
+0.311819
+1249.324868
+2.166576
+1363.860509
+83.981698
+83.981698
+0.429936
+2.731067
+0.003708
+1266.529570
+0.363697

tests/calculation-validation/extracted/test_data.json

@@ -0,0 +1,16 @@
+{
+  "timestamp": "2025-11-09T16:57:46+01:00",
+  "executableOpportunities": 11,
+  "totalOpportunities": 23,
+  "v3Calculations": 600,
+  "thresholdChecks": 11,
+  "rejections": 23,
+  "logFile": "/tmp/mev_latest_logs.txt",
+  "extractedFiles": {
+    "executable": "/docker/mev-beta/tests/calculation-validation/extracted/executable_opportunities.log",
+    "details": "/docker/mev-beta/tests/calculation-validation/extracted/opportunity_details.log",
+    "v3Calcs": "/docker/mev-beta/tests/calculation-validation/extracted/v3_calculations.log",
+    "thresholds": "/docker/mev-beta/tests/calculation-validation/extracted/threshold_checks.log",
+    "rejections": "/docker/mev-beta/tests/calculation-validation/extracted/rejections.log"
+  }
+}