Title#

feat: extract hardcoded org and label constants to TenantConfigService (#353)

Problem#

Several services (ArtefactsService, PhaseHooksService, GitHubAdapter) used hardcoded string constants for the GitHub org (GH_ORG) and label names ('in-refinement', 'refined', 'in-review', 'agent-blocked'). This made org and label names non-configurable per tenant.

Task / Link#

Closes #353

Changes#

• Removed GH_ORG export from src/config/constants.ts; ARTEFACTS_REPO now uses an inline string
• ArtefactsService: injected TenantConfigService; replaced all GH_ORG usages with tenantConfig.getConfig().org
• PhaseHooksService: injected TenantConfigService; replaced 5 hardcoded label strings with tenantConfig.getConfig().labels.*
• GitHubAdapter: injected TenantConfigService; replaced 3 'in-refinement' comparisons with tenantConfig.getConfig().labels.inRefinement
• Module files (ArtefactsModule, PhaseHooksModule, WebhookModule) updated to import TenantModule
• Unit tests updated with TenantConfigService mock in all affected spec files and integration test utils

Notes#

• Depends on #348 (TenantConfigService implementation) — merged first
• ARTEFACTS_REPO remains a hardcoded infrastructure constant (not tenant-specific)
• 6 pre-existing watchdog test failures on master are unrelated to this change

Testing#

• npm run lint — passed
• npm run test — 750 tests pass; 6 pre-existing watchdog failures unchanged