Problem#

ClaudeInvocationService hard-coded GitHub credentials for every Claude invocation. The service needed to select the correct auth provider and inject platform-specific env vars based on task.platform (github | bitbucket | jira).

Task / Link#

BJ-10 — Closes #550

Changes#

• ClaudeInvocationService: switched from single PLATFORM_AUTH_PROVIDER to per-platform optional injections (@Optional() for Bitbucket and Jira); added a switch on env['PLATFORM'] that emits the correct token/username/config env block per platform
• InvokeModule: imports BitbucketModule and JiraModule (both optional — app boots without Atlassian credentials)
• phase-router/buildEnv(): sets env['PLATFORM'] = task.platform ?? 'github' so the platform field flows end-to-end from task to invocation
• claude-invocation.service.spec.ts: added tests for github regression, bitbucket env injection, jira env injection, and throws-when-provider-missing cases

Notes#

• task.platform column (BJ-0 / #540) is not yet on TaskEntity; the cast falls back to 'github' until BJ-0 lands
• Unknown platform values fall through to the default case which uses the GitHub provider (safe fallback)
• BITBUCKET_REPO env var removed — workspace is the install boundary per #595

Testing#

• npm run test — 999 tests pass, 62 suites (includes new platform-switching cases)
• npm run lint — zero warnings