cagent pull fails for non-DockerHub registries - ref hash mismatch

[tdabasinskas]

When pulling from a non-Docker Hub registry (e.g., ghcr.io), cagent stores the ref under a hash of the reference without the registry prefix, but looks it up using a hash of the full reference including the registry.

Example:

• Full reference: ghcr.io/org/repo/image:latest
• Stored under hash of: org/repo/image:latest → 3f2212a7...
• Looked up with hash of: ghcr.io/org/repo/image:latest → 66ea1c95...

Workaround: Create a symlink between the two hashes in ~/.cagent/store/refs/

Version: v1.15.3