[M3] Deployer: GitHub repo + DO App Platform deployment

[ComBba]

Overview

Implement the deployer node: create GitHub repo, push generated code, deploy to DO App Platform, poll for deployment completion, return live URL.

Acceptance Criteria

• GitHub repo created automatically (public, MIT license)
• All generated files pushed (frontend, backend, .do/app.yaml, README, LICENSE)
• DO App Platform app created via pydo SDK
• Managed PostgreSQL provisioned if needed
• Deployment status polled until complete or timeout (5 min)
• Live URL returned in state["deploy_result"]
• Error recovery: log analysis → config fix → retry (max 2)
• Fallback: ZIP download if deployment fails
• SSE events: deploy.status, deploy.complete

Technical Notes

• GitHub: PyGithub library for repo creation + file push
• DO: pydo SDK for apps.create(), apps.list_deployments(), apps.get_logs()
• App Spec YAML generated by doc_generator
• GitHub token needs repo scope, DO token needs write access

Dependencies

• [M3] Code Generator: Frontend + Backend code generation #9 (generated code to push and deploy)

Reference

• docs/reference/09-agent-architecture.md — Node 7: deployer
• docs/reference/10-technical-plan.md — Deploy Commands section

[ComBba]

Implemented in PR #32 — Deployer creates GitHub repo via PyGithub and pushes generated code. Real token verified.