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>

orig/config/providers_runtime.yaml.backup_single_rpc_20251031_190652

@@ -0,0 +1,83 @@
+# Simplified Runtime Provider Configuration - Free Public Endpoints Only
+# This config uses only free Arbitrum public endpoints for testing
+
+global_limits:
+  connection_timeout: 30s
+  idle_timeout: 300s
+  max_concurrent_connections: 20
+  read_timeout: 60s
+  write_timeout: 30s
+
+monitoring:
+  enabled: true
+  log_slow_requests: true
+  metrics_interval: 60s
+  slow_request_threshold: 5s
+  track_provider_performance: true
+
+provider_pools:
+  execution:
+    failover_enabled: true
+    health_check_interval: 30s
+    max_concurrent_connections: 10
+    providers:
+      - Arbitrum Public HTTP
+      - Arbitrum Public WS
+    strategy: reliability_first
+
+  read_only:
+    failover_enabled: true
+    health_check_interval: 30s
+    max_concurrent_connections: 15
+    providers:
+      - Arbitrum Public WS
+      - Arbitrum Public HTTP
+    strategy: websocket_preferred
+
+providers:
+  # Free public HTTP endpoint
+  - name: Arbitrum Public HTTP
+    type: standard
+    http_endpoint: https://arb1.arbitrum.io/rpc
+    ws_endpoint: ""
+    priority: 1
+    features:
+      - execution
+      - transaction_submission
+      - reading
+    rate_limit:
+      requests_per_second: 5
+      burst: 10
+      timeout: 30s
+      max_retries: 3
+      retry_delay: 2s
+    health_check:
+      enabled: true
+      interval: 60s
+      timeout: 30s
+
+  # Free public WebSocket endpoint
+  - name: Arbitrum Public WS
+    type: standard
+    http_endpoint: https://arb1.arbitrum.io/rpc
+    ws_endpoint: wss://arb1.arbitrum.io/ws
+    priority: 1
+    features:
+      - reading
+      - real_time
+    rate_limit:
+      requests_per_second: 5
+      burst: 10
+      timeout: 60s
+      max_retries: 3
+      retry_delay: 2s
+    health_check:
+      enabled: true
+      interval: 30s
+      timeout: 60s
+
+rotation:
+  strategy: priority_based
+  fallover_enabled: true
+  health_check_required: true
+  retry_failed_after: 5m