chore: add schemata-codegen to downstream notifications

[alltheseas]

Summary

• Adds schemata-codegen to the notify-downstream.yml matrix
• When a new schemata release is published, schemata-codegen will receive a schema-update dispatch event

Context

Companion to nostrability/schemata-codegen#33 which adds an update-schemata.yml workflow to auto-create version bump PRs.

Test plan

• Verify the matrix now includes 12 repos
• After next schemata release, confirm dispatch reaches schemata-codegen

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated automated release notification system to include additional repository in the deployment notification chain, improving the efficiency of schema synchronization processes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 0f3c2159-9b26-4d2c-a45e-223bf67a2182

📥 Commits

Reviewing files that changed from the base of the PR and between 550ec7d and fddd076.

📒 Files selected for processing (1)

• .github/workflows/notify-downstream.yml

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📝 Walkthrough

Walkthrough

The workflow's job matrix in the downstream notification pipeline is extended by adding schemata-codegen to the repo list, enabling the schema-update event to be triggered for this additional repository upon release publication.

Changes

Cohort / File(s)	Summary
Workflow Configuration .github/workflows/notify-downstream.yml	Added schemata-codegen to the repository dispatch job matrix to include it in downstream notifications.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 Hoppy workflows, hopping true,
Schemata codegen joins the brew!
One line added, notifications flow,
Downstream repos now all aglow! 🚀

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding schemata-codegen to the downstream notifications workflow matrix.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/notify-codegen

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