chore: add ruff lint to steering docs and auto-lint hook

- Steering: emphasize running ruff before committing Python changes
- Hook: auto-runs ruff check --fix on services/**/*.py when files are edited

.kiro/hooks/ruff-lint-check.kiro.hook

@@ -0,0 +1,17 @@
+{
+  "enabled": true,
+  "name": "Ruff Lint Check",
+  "description": "Runs ruff check on edited Python service files to catch lint errors before they reach CI",
+  "version": "1",
+  "when": {
+    "type": "fileEdited",
+    "patterns": [
+      "services/**/*.py"
+    ]
+  },
+  "then": {
+    "type": "runCommand",
+    "command": ".venv/bin/ruff check --fix services/",
+    "timeout": 15
+  }
+}

.kiro/steering/development-process.md

@@ -24,6 +24,8 @@
 - Run Python tests: `python -m pytest tests/ -x --tb=short -q`
 - Run frontend tests: `cd frontend && npx vitest --run`
 - Lint Python: `.venv/bin/ruff check services/`
+- **Always run `.venv/bin/ruff check services/` before committing Python changes** — CI will reject the push if ruff fails
+- Ruff auto-fix: `.venv/bin/ruff check --fix services/` (fixes import sorting and other auto-fixable issues)
 - Ruff is pinned to `ruff==0.15.10` in `requirements.txt` — CI uses the same version
 - Ruff config: `ruff.toml` with `known-first-party = ["services"]` for consistent import sorting
 - Pre-existing test failures (not regressions): `test_extractor_prompts.py`, `test_extractor_schemas.py`, `test_filings_adapter.py`, `test_ollama_client.py`