Add 4 new integration-style unit tests for GetTriageQueue using mock
HTTP servers: full integration test verifying issue filtering (assigned
vs unassigned), PR inclusion, and priority sorting; empty orgs test;
all-assigned test (expect empty queue); and label extraction test
verifying multi-label items are correctly populated.
Closesleeworks-agents/gitea-mobile#117
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>