v0.7.3

• 202ab45 refactor(model-defaults): update gptcoder default model from gpt-5.3-codex to gpt-5.4
• 4eaab5b refactor(model-defaults): update OpenAI native provider model from gpt-5.1-codex-mini to gpt-5.4-mini
• 5286d24 Merge pull request #7 from AndreDalwin/feature/default-model-changes
• 67836da refactor(test): split shared module mock into granular imports for orchestrator session tests
• 5a51564 refactor(model-fallback): add provider-specific model catalog overrides for paid-only scenarios

Thank you to 1 community contributor:

• @AndreDalwin:
  • refactor(model-fallback): add provider-specific model catalog overrides for paid-only scenarios
  • refactor(test): split shared module mock into granular imports for orchestrator session tests
  • Merge pull request #7 from AndreDalwin/feature/default-model-changes
  • refactor(model-defaults): update OpenAI native provider model from gpt-5.1-codex-mini to gpt-5.4-mini
  • refactor(model-defaults): update gptcoder default model from gpt-5.3-codex to gpt-5.4