feat(audit): retain rolling phase0 prune reports

src/audit/phase0BaselineArtifactRetention.test.ts

@@ -12,20 +12,23 @@ describe('phase0BaselineArtifactRetention', () => {
       'phase0_baseline_live_backend_pi_embedded_2026-02-27-010203.jsonl',
       'phase0_baseline_live_backend_native_2026-02-27-010203.json',
       'phase0_baseline_live_backend_drift_2026-02-27-010203.md',
+      'phase0_baseline_live_prune_2026-02-27-010203.json',
       'phase0_baseline_live_2026-02-27.json',
       'phase0_baseline_live_gateway_2026-02-27.jsonl',
       'phase0_baseline_2026-02-25.md',
       'phase0_baseline_live_backend_pi_embedded_2026-02-27.md',
+      'phase0_baseline_live_prune_2026-02-27.md',
       'not_a_phase0_file.txt',
     ]);
 
-    expect(rows).toHaveLength(5);
+    expect(rows).toHaveLength(6);
     expect(rows.map((row) => row.family).sort()).toEqual([
       'backend_drift',
       'backend_native',
       'backend_pi_embedded',
       'channel',
       'gateway',
+      'prune',
     ]);
   });
 
@@ -43,7 +46,10 @@ describe('phase0BaselineArtifactRetention', () => {
       'phase0_baseline_live_backend_native_2026-02-27-020304.json',
       'phase0_baseline_live_backend_drift_2026-02-27-010203.json',
       'phase0_baseline_live_backend_drift_2026-02-27-020304.json',
+      'phase0_baseline_live_prune_2026-02-27-010203.json',
+      'phase0_baseline_live_prune_2026-02-27-020304.json',
       'phase0_baseline_live_2026-02-27.json',
+      'phase0_baseline_live_prune_2026-02-27.json',
     ];
 
     const plan = planRollingPhase0ArtifactRetention(files, 1);
@@ -53,6 +59,7 @@ describe('phase0BaselineArtifactRetention', () => {
       { family: 'backend_pi_embedded', total_tags: 2, keep_tags: 1, remove_tags: 1 },
       { family: 'backend_native', total_tags: 2, keep_tags: 1, remove_tags: 1 },
       { family: 'backend_drift', total_tags: 2, keep_tags: 1, remove_tags: 1 },
+      { family: 'prune', total_tags: 2, keep_tags: 1, remove_tags: 1 },
     ]);
 
     const removeSet = new Set(plan.remove.map((row) => row.file_name));
@@ -62,23 +69,28 @@ describe('phase0BaselineArtifactRetention', () => {
     expect(removeSet.has('phase0_baseline_live_backend_pi_embedded_2026-02-27-010203.json')).toBe(true);
     expect(removeSet.has('phase0_baseline_live_backend_native_2026-02-27-010203.json')).toBe(true);
     expect(removeSet.has('phase0_baseline_live_backend_drift_2026-02-27-010203.json')).toBe(true);
+    expect(removeSet.has('phase0_baseline_live_prune_2026-02-27-010203.json')).toBe(true);
 
     const keepSet = new Set(plan.keep.map((row) => row.file_name));
     expect(keepSet.has('phase0_baseline_live_2026-02-27.json')).toBe(false);
+    expect(keepSet.has('phase0_baseline_live_prune_2026-02-27.json')).toBe(false);
     expect(keepSet.has('phase0_baseline_live_2026-02-27-020304.json')).toBe(true);
     expect(keepSet.has('phase0_baseline_live_2026-02-27-020304.md')).toBe(true);
+    expect(keepSet.has('phase0_baseline_live_prune_2026-02-27-020304.json')).toBe(true);
   });
 
   it('supports zero keep limit', () => {
     const plan = planRollingPhase0ArtifactRetention([
       'phase0_baseline_live_2026-02-27-010203.json',
       'phase0_baseline_live_gateway_2026-02-27-010203.json',
+      'phase0_baseline_live_prune_2026-02-27-010203.md',
     ], 0);
 
     expect(plan.keep).toHaveLength(0);
     expect(plan.remove.map((row) => row.file_name).sort()).toEqual([
       'phase0_baseline_live_2026-02-27-010203.json',
       'phase0_baseline_live_gateway_2026-02-27-010203.json',
+      'phase0_baseline_live_prune_2026-02-27-010203.md',
     ]);
   });
 

src/audit/phase0BaselineArtifactRetention.ts

@@ -3,7 +3,8 @@ export type Phase0RollingArtifactFamily =
   | 'gateway'
   | 'backend_pi_embedded'
   | 'backend_native'
-  | 'backend_drift';
+  | 'backend_drift'
+  | 'prune';
 
 export interface Phase0RollingArtifactFile {
   file_name: string;
@@ -46,6 +47,10 @@ const FAMILY_PATTERNS: Array<{ family: Phase0RollingArtifactFamily; pattern: Reg
     family: 'backend_drift',
     pattern: /^phase0_baseline_live_backend_drift_(\d{4}-\d{2}-\d{2}-\d{6})\.(json|md)$/,
   },
+  {
+    family: 'prune',
+    pattern: /^phase0_baseline_live_prune_(\d{4}-\d{2}-\d{2}-\d{6})\.(json|md)$/,
+  },
 ];
 
 function parseRollingTagTimestampMs(tag: string): number | undefined {