feat(audit): retain rolling phase0 prune reports

docs/plans/artifacts/phase0_baseline_live_prune_2026-02-27.json

@@ -1,5 +1,5 @@
 {
-  "generated_at": "2026-02-27T18:48:13.082Z",
+  "generated_at": "2026-02-27T18:55:02.289Z",
   "artifacts_dir": "/home/will/lab/flynn/docs/plans/artifacts",
   "keep_per_family": 8,
   "apply": false,
@@ -261,6 +261,18 @@
         "family": "gateway",
         "tag": "2026-02-27-175943",
         "tag_timestamp_ms": 1772215183000
+      },
+      {
+        "file_name": "phase0_baseline_live_prune_2026-02-27-184726.json",
+        "family": "prune",
+        "tag": "2026-02-27-184726",
+        "tag_timestamp_ms": 1772218046000
+      },
+      {
+        "file_name": "phase0_baseline_live_prune_2026-02-27-184726.md",
+        "family": "prune",
+        "tag": "2026-02-27-184726",
+        "tag_timestamp_ms": 1772218046000
       }
     ],
     "remove": [],
@@ -294,6 +306,12 @@
         "total_tags": 3,
         "keep_tags": 3,
         "remove_tags": 0
+      },
+      {
+        "family": "prune",
+        "total_tags": 1,
+        "keep_tags": 1,
+        "remove_tags": 0
       }
     ]
   }

docs/plans/artifacts/phase0_baseline_live_prune_2026-02-27.md

@@ -3,7 +3,7 @@
 Artifacts dir: /home/will/lab/flynn/docs/plans/artifacts
 Keep per family: 8
 Mode: dry-run
-Keep files: 42
+Keep files: 44
 Remove files: 0
 
 ## Families
@@ -12,6 +12,7 @@ Remove files: 0
 - backend_pi_embedded: tags total=3 keep=3 remove=0
 - backend_native: tags total=3 keep=3 remove=0
 - backend_drift: tags total=3 keep=3 remove=0
+- prune: tags total=1 keep=1 remove=0
 
 ## Remove List
 - none