fix: clarify two misleading script messages

[github-actions]

Summary

This PR resolves #855 by updating two user-facing script messages that could mislead readers.

Changes

• scripts/trigger-ci-workflows.sh
  • Changed summary text from "Dispatched ..." to "Attempted to dispatch ..." so output no longer implies every dispatch succeeded when per-workflow failures may have occurred.
• claude-workflows/pr-review/scripts/pr-diff.sh
  • Clarified the single-file error message to indicate either the file is not in the PR diff or patch data is unavailable (binary/too large).

Validation

• make lint ✅
• make test ✅ (run with UV_CACHE_DIR=/tmp/gh-aw/agent/uv-cache and uv from a temporary virtualenv due runner environment constraints)

Closes #855.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 8f207ff9-eb94-4c2b-a9c2-37a23b98dd17

📥 Commits

Reviewing files that changed from the base of the PR and between e2e9566 and b276491.

📒 Files selected for processing (2)

• claude-workflows/pr-review/scripts/pr-diff.sh
• scripts/trigger-ci-workflows.sh

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📝 Walkthrough

Walkthrough

Two user-facing error/status messages were updated in bash scripts. The first modifies the error message in claude-workflows/pr-review/scripts/pr-diff.sh when patch data is unavailable, now indicating the file may be missing from the PR diff or patch data is unavailable due to binary/size constraints. The second changes the final status line in scripts/trigger-ci-workflows.sh from "Dispatched" to "Attempted" to better reflect cases where workflow dispatch failures occurred. Both changes are single-line string modifications with no alterations to control flow, exit codes, or logic.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The pull request addresses both objectives from issue #855: updating dispatch summary wording to 'Attempted' and clarifying the pr-diff error message to indicate patch data unavailability.
Out of Scope Changes check	✅ Passed	Changes are limited to two error message updates in the specified files with no extraneous modifications.

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✨ Finishing Touches

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🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/issue-855-misleading-messages-deddbe92fc3121ed

• 🛠️ Update Documentation: Commit on current branch
• 🛠️ Update Documentation: Create PR

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