Promote credentials to core effects (#335)
* Promote credentials to core effects
- Add app-scoped TypeScript and Zig credential effects with capability and permission gates plus platform-backed storage.
- Redact credential journal results, synthesize deterministic replay placeholders, and provide hermetic devhost and test stores.
- Update checker diagnostics, mobile plumbing, SDK surfaces, documentation, skills, and conformance coverage.
* fix(runtime): harden credential effect lifecycle
* fix: harden credential effect handling
Chris Tate
d7aeea1ea9