This fixes critical bugs where Stringable objects were used in strict comparisons and collection key lookups, causing service existence checks and domain lookups to fail.
**Changes:**
- Line 539: Added ->value() to $originalServiceName conversion
- Line 541: Added ->value() to $serviceName normalization
- Line 621: Removed redundant (string) cast now that $serviceName is a plain string
**Impact:**
- Service existence check now works correctly (line 606: $transformedServiceName === $serviceName)
- Domain lookup finds existing domains (line 615: $domains->get($serviceName))
- Prevents duplicate domain entries in docker_compose_domains collection
**Tests:**
- Added comprehensive unit test suite in ApplicationParserStringableTest.php
- 9 test cases covering type verification, strict comparisons, collection operations, and edge cases
- All tests pass (24 tests, 153 assertions across related parser tests)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
