docs: apply fleet-template (16-artifact scaffold)

Adds missing standard artifacts:
- README.md (if missing)
- AGENTS.md (AI agent contract)
- PLAN.md (current sprint)
- STATUS.md (where we are)
- DEVELOPMENT.md (dev workflow)
- DEPLOYMENT.md (deploy procedure)
- TESTING.md (test strategy)
- DECISIONS.md (ADR index + templates)
- .github/CODEOWNERS
- .github/workflows/ci.yml

Preserves all existing artifacts.

Refs: RugMunchMedia/fleet-template

tests/test_pipeline.py

@@ -0,0 +1,53 @@
+"""Tests for pipeline hook system."""
+
+from pipeline import HOOK_POINTS, Pipeline
+
+
+def test_pipeline_init() -> None:
+    p = Pipeline()
+    assert len(p.list_hooks()) == len(HOOK_POINTS)
+
+
+def test_pipeline_register() -> None:
+    p = Pipeline()
+
+    def my_hook(**kwargs: object) -> dict[str, object]:
+        return {"custom": "value"}
+
+    p.register("before_scrape", my_hook)
+    hooks = p.list_hooks()
+    assert "my_hook" in list(hooks["before_scrape"])
+
+
+def test_pipeline_clear() -> None:
+    p = Pipeline()
+
+    def my_hook(**kwargs: object) -> dict[str, object]:
+        return {}
+
+    p.register("before_scrape", my_hook)
+    p.clear("before_scrape")
+    assert len(p.list_hooks()["before_scrape"]) == 0
+
+
+def test_pipeline_clear_all() -> None:
+    p = Pipeline()
+
+    def my_hook(**kwargs: object) -> dict[str, object]:
+        return {}
+
+    p.register("before_scrape", my_hook)
+    p.clear()
+    for point in HOOK_POINTS:
+        assert len(p.list_hooks()[point]) == 0
+
+
+def test_pipeline_invalid_hook_point() -> None:
+    p = Pipeline()
+    import pytest
+
+    def my_hook(**kwargs: object) -> dict[str, object]:
+        return {}
+
+    with pytest.raises(ValueError, match="Unknown hook point"):
+        p.register("invalid_point", my_hook)