WAVE 112 AGENT 13: DATETIME TYPE ERRORS - SQLX CACHE REGENERATION
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MISSION: Fix 11 DateTime type errors by regenerating SQLx cache
STATUS: ✅ SUCCESS - All errors resolved in ~10 minutes

ROOT CAUSE:
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1. SQL Syntax Error (PRIMARY):
   - File: services/api_gateway/src/auth/mfa/mod.rs:440
   - Issue: Type annotation in INSERT statement (only valid in SELECT)
   - Fix: Removed `as "expires_at: chrono::DateTime<chrono::Utc>"` from INSERT

2. Stale SQLx Cache (SECONDARY):
   - Old cache had incorrect type mappings
   - Solution: Regenerated with live database connection

RESOLUTION STEPS:
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1. ✅ Verified PostgreSQL running (docker-compose up -d)
2. ✅ Confirmed database connectivity (psql SELECT 1)
3. ✅ Fixed SQL syntax error (removed type annotation from INSERT)
4. ✅ Regenerated SQLx cache (cargo sqlx prepare --workspace)
5. ✅ Verified compilation (SQLX_OFFLINE=true cargo build)

RESULTS:
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- Compilation Errors: 11 → 0 (-11 ✅)
- DateTime Type Errors: 11 → 0 (-11 ✅)
- SQLx Cache Files Generated: 11 query metadata files
- Build Time (offline): 0.28s ✅
- Build Status: SUCCESS (0 errors, 9 warnings)

FILES MODIFIED:
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1. services/api_gateway/src/auth/mfa/mod.rs (1 line - removed type annotation)
2. .sqlx/query-*.json (11 cache files - regenerated)

KEY LEARNINGS:
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- SQLx type annotations: SELECT ✅ | INSERT ❌ | UPDATE/DELETE (inferred)
- Always regenerate cache with live database connection
- Use SQLX_OFFLINE=true in CI/CD to avoid database dependency
- Commit .sqlx/ to version control for reproducible builds

NEXT STEPS:
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- Address 9 warnings (cargo fix --lib -p api_gateway)
- Proceed with remaining Wave 112 compilation fixes
- Coverage measurement (after all compilation errors fixed)

DOCUMENTATION: WAVE112_AGENT13_DATETIME_FIXES.md