Add IFactory concept test for UniqueTimestampFactory

[konard]

Summary

• ✅ Adds comprehensive IFactory concept test for UniqueTimestampFactory as requested in issue Once IFactory concept will be ready in Interfaces library add a test that checks that UniqueTimestampFactory implements IFactory concept #53
• ✅ Verifies interface compliance, type consistency, and factory-specific behavioral contracts
• ✅ Tests uniqueness guarantee and covariance support
• ✅ All tests passing

Test Coverage

The new UniqueTimestampFactoryImplementsIFactoryConceptTest validates:

1. Interface Compliance: Confirms UniqueTimestampFactory implements IFactory
2. Instance Creation: Verifies factory creates valid, non-null instances
3. Type Consistency: Ensures all created instances are of correct type
4. Uniqueness Contract: Validates factory-specific requirement for unique timestamps
5. Scalability: Tests consistent behavior across 100 invocations with full uniqueness verification
6. Covariance Support: Verifies factory works correctly when used as interface type

Technical Details

• Added using Platform.Interfaces; import to access IFactory interface
• Comprehensive behavioral verification beyond basic interface implementation
• Validates both syntactic (interface) and semantic (concept) conformance
• No breaking changes to existing functionality

🤖 Generated with Claude Code

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Resolves #53