docs: salvage FastAPI review patterns

commands/fastapi-review.md

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+---
+description: Review a FastAPI application for architecture, async correctness, dependency injection, Pydantic schemas, security, performance, and testability.
+---
+
+# FastAPI Review
+
+Invoke the `fastapi-reviewer` agent for a focused FastAPI review.
+
+## Usage
+
+```text
+/fastapi-review [file-or-directory]
+```
+
+## Review Areas
+
+- App factory, router boundaries, middleware, and exception handlers.
+- Pydantic request and response schema separation.
+- Dependency injection for database sessions, auth, pagination, and settings.
+- Async database and external HTTP patterns.
+- CORS, auth, rate limits, logging, and secret handling.
+- OpenAPI metadata and documented response models.
+- Test client setup and dependency overrides.
+
+## Expected Output
+
+```text
+[SEVERITY] Short issue title
+File: path/to/file.py:42
+Issue: What is wrong and why it matters.
+Fix: Concrete change to make.
+```
+
+## Related
+
+- Agent: `fastapi-reviewer`
+- Skill: `fastapi-patterns`
+- Command: `/python-review`
+- Skill: `security-scan`