[self-care:dashboard-data-schema] Update dashboard data source schemas

This replaces `specs/dashboard-data.md` with the latest generated dashboard data schema inventory from the deployed Pages manifest.

It updates the document to the inferred pseudo-schemas for 44 advertised `sources/*.json` files, including manifest, configuration, workflow and run telemetry, findings, and performance datasets.

### Control Plane
- Correlation ID: `34416148465-490`
- Central repository: `githubnext/gh-aw-cao`
- Control plane run: https://github.com/githubnext/gh-aw-cao/actions/runs/34416148465

---

> [!NOTE]
> This was originally intended as a pull request, but the git push operation failed.
>
> **Original error:** The process '/usr/bin/git' failed with exit code 1
>
> **Workflow Run:** [View run details and download bundle artifact](https://github.com/githubnext/gh-aw-cao/actions/runs/34416458991)
>
> The bundle file is available in the `agent` artifact in the workflow run linked above.

Create the pull request manually

```sh
# Download the artifact from the workflow run
gh run download '34416458991' -n agent -D '/tmp/agent-34416458991'

# Resolve the bundle source ref, fetch it into a temporary ref, then create the local branch
bundle_path='/tmp/agent-34416458991/aw-githubnext-gh-aw-cao-chore-dashboard-data-schema-sync-20260909.bundle'
temp_ref='refs/bundles/create-pr-chore-dashboard-data-schema-sync-20260909-3fe8fea2e3b099f7-7c2fa1a4'
target_ref='refs/heads/chore/dashboard-data-schema-sync-20260909-3fe8fea2e3b099f7'
bundle_source_ref=$(git bundle list-heads "$bundle_path" | awk '$2 ~ /^refs\/heads\// { print $2 }')
if [ -z "$bundle_source_ref" ]; then
bundle_source_ref=$(git bundle list-heads "$bundle_path" | awk '$2 == "HEAD" { print $2 }')
fi
if [ "$(printf '%s\n' "$bundle_source_ref" | sed '/^$/d' | wc -l | tr -d ' ')" != "1" ]; then
echo "Expected exactly one bundle source ref, found: $bundle_source_ref" >&2
exit 1
fi
git fetch "$bundle_path" "${bundle_source_ref}:${temp_ref}"
git update-ref "$target_ref" "$temp_ref"
git checkout 'chore/dashboard-data-schema-sync-20260909-3fe8fea2e3b099f7'
# Ensure the working tree matches the updated branch
git reset --hard
# Remove the temporary bundle ref
git update-ref -d "$temp_ref"

# Push the branch to the target remote
git push 'origin' 'chore/dashboard-data-schema-sync-20260909-3fe8fea2e3b099f7'

# Create the pull request
gh pr create --title '[self-care:dashboard-data-schema] Update dashboard data source schemas' --base 'main' --head 'chore/dashboard-data-schema-sync-20260909-3fe8fea2e3b099f7' --repo 'githubnext/gh-aw-cao'
```

> Generated by [SelfCare / Dashboard Data Schema](https://github.com/githubnext/gh-aw-cao/actions/runs/34416458991) · copilot · gpt54 · 19.3 AIC · ⌖ 15.8 AIC · ⊞ 22.6K · [◷](https://github.com/search?q=repo%3Agithubnext%2Fgh-aw-cao+%22gh-aw-workflow-id%3A+self-care-dashboard-data-schema%22&type=pullrequests)
> - [x] expires on Sep 16, 2026, 11:26 PM UTC

Start with specs/dashboard-data.md and the linked workflow run 34416458991. Download the agent bundle described in the issue, inspect the generated branch contents, and compare the 44 source schemas with the deployed Pages manifest. Done means the document contains the latest inventory and the generated branch is pushed so a pull request can be created.

Written by the indexing model from the issue text.