retention and run history

src/guide_board/execution.py

@@ -12,6 +12,7 @@ from guide_board.io import write_json
 from guide_board.mapping import build_mapping_records, summarize_mappings
 from guide_board.planning import build_run_plan
 from guide_board.policy import apply_policy
+from guide_board.retention import build_retention_summary
 from guide_board.runners import run_step
 from guide_board.schema import assert_valid
 
@@ -61,6 +62,8 @@ def run_assessment(
         "target_profile_ref": plan["target_profile_snapshot"]["id"],
         "assessment_profile_ref": plan["assessment_profile_snapshot"]["id"],
     }
+    retention_summary = build_retention_summary(run_metadata, plan, assessment_package)
+    assert_valid(retention_summary, "retention-summary")
 
     _write_run_directory(
         run_dir,
@@ -70,6 +73,7 @@ def run_assessment(
         findings,
         mapping_records,
         assessment_package,
+        retention_summary,
     )
     return {
         "status": run_metadata["status"],
@@ -77,6 +81,7 @@ def run_assessment(
         "run_dir": str(run_dir),
         "assessment_package": str(run_dir / "reports" / "assessment-package.json"),
         "report": str(run_dir / "reports" / "report.md"),
+        "retention_summary": str(run_dir / "retention-summary.json"),
     }
 
 
@@ -285,8 +290,10 @@ def _write_run_directory(
     findings: list[dict[str, Any]],
     mapping_records: list[dict[str, Any]],
     assessment_package: dict[str, Any],
+    retention_summary: dict[str, Any],
 ) -> None:
     write_json(run_dir / "run.json", run_metadata)
+    write_json(run_dir / "retention-summary.json", retention_summary)
     write_json(run_dir / "plan.json", plan)
     write_json(run_dir / "sources.lock.json", plan["source_lock"])
     write_json(run_dir / "target-profile.snapshot.json", plan["target_profile_snapshot"])