Bundle dependency updates

[github-actions]

Caution

Protected files were modified in this change.
This pull request is in request_review mode and requires explicit human scrutiny before merge.

Protected files: .config/dotnet-tools.json, .github/workflows/copilot-setup-steps.yml, .github/workflows/dependency-pr-bundler.lock.yml

Bundles the following dependency updates (all with passing CI checks):

• Update github/gh-aw-actions action to v0.78.2 #998: Update github/gh-aw-actions action to v0.78.1
• Update dependency nerdbank.dotnetrepotools to v1.5.15 #999: Update dependency nerdbank.dotnetrepotools to v1.5.6

Note

PR #1001 (Update actions/checkout digest to df4cb1c) was not included because the macOS CI build check is currently failing. The failure appears unrelated to the PR's changes (which only update workflow action digest hashes), likely a pre-existing flaky test.

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• api.nuget.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "api.nuget.org"

See Network Configuration for more information.

Generated by dependency-pr-bundler · sonnet46 1.6M · ◷

[github-actions]

Protected files were modified in this pull request and require manual scrutiny before merge.

Please verify that each protected-file change is intentional, policy-compliant, and safe:

• Protected files: .config/dotnet-tools.json, .github/workflows/copilot-setup-steps.yml, .github/workflows/dependency-pr-bundler.lock.yml