[changelog] Add changelog for java/v1.0.8

Start with CHANGELOG.md and the linked Release Changelog Generator workflow run. Download the agent artifact and inspect the aw-changelog-java-v1.0.8.bundle before applying or recreating the branch. Done means CHANGELOG.md contains the java/v1.0.8 entry covering per-agent reasoning effort and strongly-typed expAssignments, followed by the requested pull request.

[!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: CHANGELOG.md

Adds CHANGELOG.md entry for the java/v1.0.8 release (2 user-facing changes: per-agent reasoning effort and strongly-typed expAssignments).

[!WARNING]

Firewall blocked 1 domain

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

• awmgmcpg

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

network:
  allowed:
    - defaults
    - "awmgmcpg"

See Network Configuration for more information.

Generated by Release Changelog Generator · 44.4 AIC · ⌖ 5.53 AIC · ⊞ 7.2K · ◷

[!NOTE]
This was originally intended as a pull request, but the git push operation failed.

Original error: pushSignedCommits: refusing unsigned push for branch 'changelog/java-v1.0.8-e1e3ac881ac8d09a': Signed-commit payload violates file-protection policy (request_review): CHANGELOG.md

Workflow Run: View run details and download bundle artifact

The bundle file is available in the agent artifact in the workflow run linked above.

To create a pull request with the changes:

# Download the artifact from the workflow run
gh run download 29965619881 -n agent -D /tmp/agent-29965619881

# Fetch the bundle into a temporary ref, then update the local branch
git fetch /tmp/agent-29965619881/aw-changelog-java-v1.0.8.bundle refs/heads/changelog/java-v1.0.8:refs/bundles/create-pr-changelog-java-v1-0-8-e1e3ac881ac8d09a-acc663cb
git update-ref refs/heads/changelog/java-v1.0.8-e1e3ac881ac8d09a refs/bundles/create-pr-changelog-java-v1-0-8-e1e3ac881ac8d09a-acc663cb
git checkout changelog/java-v1.0.8-e1e3ac881ac8d09a
# Ensure the working tree matches the updated branch
git reset --hard
# Remove the temporary bundle ref
git update-ref -d refs/bundles/create-pr-changelog-java-v1-0-8-e1e3ac881ac8d09a-acc663cb

# Push the branch to origin
git push origin changelog/java-v1.0.8-e1e3ac881ac8d09a

# Create the pull request
gh pr create --title '[changelog] Add changelog for java/v1.0.8' --base main --head changelog/java-v1.0.8-e1e3ac881ac8d09a --repo github/copilot-sdk