Reuse the existing CoreSys websession for registry manifest requests
instead of creating a new aiohttp session. This improves performance
and follows the established pattern used throughout the codebase.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Fetch image manifests directly from container registries before pulling
to get accurate layer sizes upfront. This enables size-weighted progress
tracking where each layer contributes proportionally to its byte size,
rather than equal weight per layer.
Key changes:
- Add RegistryManifestFetcher that handles auth discovery via
WWW-Authenticate headers, token fetching with optional credentials,
and multi-arch manifest list resolution
- Update ImagePullProgress to accept manifest layer sizes via
set_manifest() and calculate size-weighted progress
- Fall back to count-based progress when manifest fetch fails
- Pre-populate layer sizes from manifest when creating layer trackers
The manifest fetcher supports ghcr.io, Docker Hub, and private
registries by using credentials from Docker config when available.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
