Stefan Agner 12dd16c781 Add registry manifest fetcher for size-based pull progress ...

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>

2025-12-07 00:39:58 +01:00

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