Agent 437 - Wave 7 Phase 3: Fix map_err wildcard patterns

## Task
Fix clippy::map_err_ignore errors by replacing .map_err(|_| ...) with .map_err(|e| ... format!("{}", e) ...)

## Execution

### Files Fixed
- common/src/types.rs: 7 errors fixed

### Changes Made
1. Line 1869: Fill quantity overflow error - capture and include error in message
2. Line 2471: Price parsing error - capture and include parse error
3. Line 2749: Decimal to Quantity conversion - capture and include conversion error  
4. Line 2883: Quantity parsing error - capture and include parse error
5. Line 2925: Decimal to f64 conversion - capture and include conversion error
6. Line 3071: NUMERIC to Price conversion (SQLx) - capture and include TryFrom error
7. Line 3108: NUMERIC to Quantity conversion (SQLx) - capture and include TryFrom error

### Pattern Applied
All fixes followed the same pattern:
```rust
// Before:
.map_err(|_| SomeError { message: "fixed message".to_owned() })

// After:
.map_err(|e| SomeError { message: format!("fixed message: {}", e) })
```

## Verification

### Before
```bash
$ cargo clippy -p common --lib -- -D clippy::map_err_ignore 2>&1 | grep "^error:" | wc -l
7
```

### After
```bash
$ cargo clippy -p common --lib -- -D clippy::map_err_ignore 2>&1 | grep "^error:" | wc -l
0
```

## Results

✅ **SUCCESS**: All 7 map_err_ignore errors in common crate eliminated
✅ **VERIFIED**: cargo clippy -p common --lib passes with -D clippy::map_err_ignore
✅ **ERROR COUNT**: 7 → 0 (100% reduction in common crate)

## Notes

- The workspace has compilation errors in services/stress_tests preventing full workspace clippy scan
- Other crates (trading_engine, adaptive-strategy) have additional map_err_ignore violations
- The common crate is now fully compliant with clippy::map_err_ignore
- All error messages now preserve the original error context

## Files Modified
1. /home/jgrusewski/Work/foxhunt/common/src/types.rs (7 fixes applied)