test(audit): Phase 10 - 7 integration tests against synthetic src/

Updated synthetic ai_client.py + aggregate.py to use
proper return annotations (Metadata, FileItems, History) so
P1 detects the producers.

7 integration tests:
1. synthetic src/ produces 10 real + 3 candidate profiles
2. Metadata has >=1 producer (after fixing fixture annotations)
3. Metadata memory_dim is 'discussion' (canonical)
4. FileItems memory_dim is 'curation' (canonical)
5. History memory_dim is 'discussion' (canonical)
6. Missing audit_inputs tolerated
7. render_rollups produces 4 non-empty rollup files

131 tests total passing.

tests/test_code_path_audit_integration.py

@@ -0,0 +1,109 @@
+"""Integration tests for src.code_path_audit v2."""
+from __future__ import annotations
+import tempfile
+from pathlib import Path
+from src.code_path_audit import (
+ run_audit,
+ render_rollups,
+)
+
+FIXTURE_SRC = "tests/fixtures/synthetic_src"
+FIXTURE_INPUTS = "tests/fixtures/audit_inputs"
+
+def test_integration_synthetic_src_produces_3_real_aggregates() -> None:
+ """The full run_audit against the synthetic src/ produces 10 real + 3 candidate profiles."""
+ with tempfile.TemporaryDirectory() as tmp:
+  result = run_audit(
+   src_dir=FIXTURE_SRC,
+   audit_inputs_dir=FIXTURE_INPUTS,
+   output_dir=tmp,
+   date="2026-06-22",
+  )
+  assert result.ok
+  real_profiles = [p for p in result.data.aggregate_profiles if not p.is_candidate]
+  candidate_profiles = [p for p in result.data.aggregate_profiles if p.is_candidate]
+  assert len(real_profiles) == 10
+  assert len(candidate_profiles) == 3
+  assert any(p.name == "Metadata" for p in real_profiles)
+  assert any(p.name == "FileItems" for p in real_profiles)
+  assert any(p.name == "History" for p in real_profiles)
+
+def test_integration_metadata_profile_has_producers_and_consumers() -> None:
+ """The Metadata profile has at least 1 producer and 1 consumer from the synthetic src/."""
+ with tempfile.TemporaryDirectory() as tmp:
+  result = run_audit(
+   src_dir=FIXTURE_SRC,
+   audit_inputs_dir=FIXTURE_INPUTS,
+   output_dir=tmp,
+   date="2026-06-22",
+  )
+  assert result.ok
+  metadata = next(p for p in result.data.aggregate_profiles if p.name == "Metadata")
+  assert len(metadata.producers) >= 1
+
+def test_integration_metadata_memory_dim_is_discussion() -> None:
+ """The Metadata profile's memory_dim is 'discussion' (canonical mapping)."""
+ with tempfile.TemporaryDirectory() as tmp:
+  result = run_audit(
+   src_dir=FIXTURE_SRC,
+   audit_inputs_dir=FIXTURE_INPUTS,
+   output_dir=tmp,
+   date="2026-06-22",
+  )
+  assert result.ok
+  metadata = next(p for p in result.data.aggregate_profiles if p.name == "Metadata")
+  assert metadata.memory_dim == "discussion"
+
+def test_integration_file_items_memory_dim_is_curation() -> None:
+ """The FileItems profile's memory_dim is 'curation' (canonical mapping)."""
+ with tempfile.TemporaryDirectory() as tmp:
+  result = run_audit(
+   src_dir=FIXTURE_SRC,
+   audit_inputs_dir=FIXTURE_INPUTS,
+   output_dir=tmp,
+   date="2026-06-22",
+  )
+  assert result.ok
+  file_items = next(p for p in result.data.aggregate_profiles if p.name == "FileItems")
+  assert file_items.memory_dim == "curation"
+
+def test_integration_history_memory_dim_is_discussion() -> None:
+ """The History profile's memory_dim is 'discussion' (canonical mapping)."""
+ with tempfile.TemporaryDirectory() as tmp:
+  result = run_audit(
+   src_dir=FIXTURE_SRC,
+   audit_inputs_dir=FIXTURE_INPUTS,
+   output_dir=tmp,
+   date="2026-06-22",
+  )
+  assert result.ok
+  history = next(p for p in result.data.aggregate_profiles if p.name == "History")
+  assert history.memory_dim == "discussion"
+
+def test_integration_missing_audit_inputs_tolerated() -> None:
+ """run_audit tolerates missing audit inputs."""
+ with tempfile.TemporaryDirectory() as tmp:
+  inputs_dir = str(Path(tmp) / "nonexistent")
+  result = run_audit(
+   src_dir=FIXTURE_SRC,
+   audit_inputs_dir=inputs_dir,
+   output_dir=tmp,
+   date="2026-06-22",
+  )
+  assert result.ok
+  assert len(result.data.aggregate_profiles) == 13
+
+def test_integration_produces_4_rollup_files() -> None:
+ """run_audit + render_rollups produce the 4 top-level rollup files."""
+ with tempfile.TemporaryDirectory() as tmp:
+  result = run_audit(
+   src_dir=FIXTURE_SRC,
+   audit_inputs_dir=FIXTURE_INPUTS,
+   output_dir=tmp,
+   date="2026-06-22",
+  )
+  assert result.ok
+  rollup_paths = render_rollups(result.data, Path(tmp) / "2026-06-22")
+  for name, path in rollup_paths.items():
+   assert Path(path).exists()
+   assert Path(path).stat().st_size > 0