feat(inference): add Prime mode for text and video

[gujieye]

Summary

• Add --prime and --workspace-id to bl text chat and bl video generate.
• Route Prime requests through workspace-scoped endpoints while honoring custom Base URL overrides.
• Require an explicit model, keep video submission and polling on the same host, and limit text Prime to Chat Completions.
• Add unit/E2E coverage and generated text/video references.
• Keep unrelated commands, including knowledge and security, unchanged.
• Harden FC-backed OSS publishing with 20 retries, 600-second attempt timeouts, capped exponential backoff, and fresh OIDC tokens for each FC attempt.

Validation

• Changed-file formatting, lint, and type checks passed.
• Prime helper tests: 3 passed.
• Text Prime/help E2E tests: 7 passed.
• Video Prime/help E2E tests: 5 passed.
• FC upload OIDC refresh regression test: 1 passed.
• git diff --check origin/main...HEAD passed.

Full-repository vp check remains blocked by 15 pre-existing formatting issues from main; none are in the Prime change set.