feat(testing): add arbitrage detection integration test

- Created comprehensive integration test script (test_arbitrage_detection.sh)
- Tests complete flow: Anvil fork → pool state → test swaps → bot monitoring
- Automated test report generation
- Successfully executed test swap on SushiSwap pool
- Bot initialization and monitoring validated
- Updated TESTING_STATUS.md with Section 7: Arbitrage Detection Integration Testing
- Added test artifacts to .gitignore

Test Results:
- ✅ Anvil fork initialization
- ✅ Pool state accessible
- ✅ Test swaps execute successfully
- ✅ Bot monitors and logs activity
- ⚠️ Limited scenarios due to fork state constraints

Next: Create controlled test pools for profit calculation validation

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

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

.gitignore

@@ -78,3 +78,8 @@ detected_swaps.jsonl
 swap_replay.log
 replayed_swaps.log
 anvil_fresh.log
+
+# Arbitrage detection test data
+arbitrage_detection_test.log
+ARBITRAGE_DETECTION_TEST_RESULTS.md
+/tmp/mev-bot-test.log