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/config.yaml

@@ -0,0 +1,109 @@
+# MEV Bot Configuration
+
+# Arbitrum node configuration
+arbitrum:
+  # RPC endpoint for Arbitrum node
+  rpc_endpoint: "${ARBITRUM_RPC_ENDPOINT}"
+  # WebSocket endpoint for Arbitrum node (optional)
+  ws_endpoint: "${ARBITRUM_WS_ENDPOINT}"
+  # Chain ID for Arbitrum (42161 for mainnet)
+  chain_id: 42161
+  # Rate limiting configuration for RPC endpoint (reduced to avoid limits)
+  rate_limit:
+    # Maximum requests per second (reduced to avoid rate limits)
+    requests_per_second: 5
+    # Maximum concurrent requests
+    max_concurrent: 3
+    # Burst size for rate limiting
+    burst: 10
+  # Fallback RPC endpoints
+  fallback_endpoints:
+    - url: "${ARBITRUM_INFURA_ENDPOINT}"
+      rate_limit:
+        requests_per_second: 3
+        max_concurrent: 2
+        burst: 5
+    - url: "https://arbitrum-rpc.publicnode.com"
+      rate_limit:
+        requests_per_second: 4
+        max_concurrent: 2
+        burst: 8
+
+# Bot configuration
+bot:
+  # Enable or disable the bot
+  enabled: true
+  # Polling interval in seconds (increased to reduce load)
+  polling_interval: 3
+  # Minimum profit threshold in USD
+  min_profit_threshold: 10.0
+  # Gas price multiplier (for faster transactions)
+  gas_price_multiplier: 1.2
+  # Maximum number of concurrent workers for processing (reduced to avoid rate limits)
+  max_workers: 3
+  # Buffer size for channels
+  channel_buffer_size: 50
+  # Timeout for RPC calls in seconds
+  rpc_timeout: 30
+
+# Uniswap configuration
+uniswap:
+  # Factory contract address
+  factory_address: "0x1F98431c8aD98523631AE4a59f267346ea31F984"
+  # Position manager contract address
+  position_manager_address: "0xC36442b4a4522E871399CD717aBDD847Ab11FE88"
+  # Supported fee tiers
+  fee_tiers:
+    - 500    # 0.05%
+    - 3000   # 0.3%
+    - 10000  # 1%
+  # Cache configuration for pool data
+  cache:
+    # Enable or disable caching
+    enabled: true
+    # Cache expiration time in seconds
+    expiration: 300
+    # Maximum cache size
+    max_size: 10000
+
+# Logging configuration
+log:
+  # Log level (debug, info, warn, error)
+  level: "debug"
+  # Log format (json, text)
+  format: "text"
+  # Log file path (empty for stdout)
+  file: "logs/mev-bot.log"
+
+# Database configuration
+database:
+  # Database file path
+  file: "mev-bot.db"
+  # Maximum number of open connections
+  max_open_connections: 10
+  # Maximum number of idle connections
+  max_idle_connections: 5
+
+# Ethereum configuration
+ethereum:
+  # Private key for transaction signing (DO NOT COMMIT TO VERSION CONTROL)
+  private_key: "${ETHEREUM_PRIVATE_KEY}"
+  # Account address
+  account_address: "${ETHEREUM_ACCOUNT_ADDRESS}"
+  # Gas price multiplier (for faster transactions)
+  gas_price_multiplier: 1.2
+
+# Smart contract addresses
+contracts:
+  # Arbitrage executor contract address
+  arbitrage_executor: "0xYOUR_ARBITRAGE_EXECUTOR_CONTRACT_ADDRESS_HERE"
+  # Flash swapper contract address
+  flash_swapper: "0xYOUR_FLASH_SWAPPER_CONTRACT_ADDRESS_HERE"
+  # Authorized caller addresses
+  authorized_callers:
+    - "${ETHEREUM_ACCOUNT_ADDRESS}"
+  # Authorized DEX addresses
+  authorized_dexes:
+    - "0x1F98431c8aD98523631AE4a59f267346ea31F984"  # Uniswap V3
+    - "0xf1D7CC64Fb4452F05c498126312eBE29f30Fbcf9"  # Uniswap V2
+    - "0xc35DADB65012eC5796536bD9864eD8773aBc74C4"  # SushiSwap