COMMIT_MESSAGE.txt

Normalize naming conventions across codebase (#204)

## Summary
Audited and normalized naming conventions to improve consistency,
readability, and contributor experience.

## Changes

### Middleware Files Renamed
- apiKeyMiddleware.js → apiKey.js
- rbacMiddleware.js → rbac.js
- idempotencyMiddleware.js → idempotency.js

Rationale: Removed redundant "Middleware" suffix to match other
middleware files (errorHandler.js, rateLimiter.js, logger.js)

### Import Updates
Updated all import statements across 10 files:
- 7 source files (routes/*)
- 3 test files

### Documentation
- Created NAMING_CONVENTIONS.md with comprehensive standards
- Created ISSUE_204_SUMMARY.md with detailed change log

## Naming Standards Established

**Files:**
- Services: PascalCase (StellarService.js)
- Models: camelCase/lowercase (apiKeys.js, transaction.js)
- Routes: lowercase (donation.js, wallet.js)
- Middleware: camelCase without suffix (apiKey.js, rbac.js)
- Utils: camelCase/lowercase (feeCalculator.js, log.js)
- Scripts: camelCase (initDB.js, manageApiKeys.js)

**Code:**
- Variables: camelCase
- Constants: UPPER_SNAKE_CASE
- Functions: camelCase
- Classes: PascalCase
- Private methods: _camelCase

## Testing
✅ All 439 tests pass
✅ No breaking changes
✅ Git history preserved with proper renames

## Acceptance Criteria
✅ Naming is consistent across the project
✅ No breaking changes introduced
✅ Documentation provided

Closes #204