Retire ROADMAP-1.0; rewrite run_eval.py as current-version metrics harness

Knocks two items off ROADMAP-2.0 (§4 eval refresh, §5 roadmap retirement):

- run_eval.py: the stale 0.6-vs-0.7 A/B is replaced (old version in git
  history) with a four-part current-version eval against the mock —
  retrieval (hybrid+priors vs keyword/entities-only baseline: R@5 1.00
  vs 0.75, MRR 1.00 vs 0.75, session/journal queries 2/2 vs 0/2,
  freshness top-1 correct vs wrong), dedup (0 dupes gate-on vs 3
  gate-off, 0 false blocks), write safety (0 silent failures across 4
  fault scenarios), durability (3/3 offline writes queued+landed, 0
  lost, 0 re-flush dupes). Results in eval/results/latest.json.
- README: metrics table published; repo-layout eval descriptor updated.
- eval/README: new harness documented; A/B framing marked historical.
- ROADMAP-1.0.md removed (fully shipped; story lives in the README
  version table + git history); dangling docstring pointer fixed in
  echo_concurrency.py; ROADMAP-2.0 checkboxes ticked.

All suites green; artifact rebuilt (1.5.1, docstring-only source change).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

eval/results/latest.json

@@ -1,154 +1,46 @@
 {
-  "params": {
-    "port": 8799,
-    "cpt": 4.0,
-    "recovery": 1500,
-    "detect_cost": 80
-  },
-  "rows": [
-    {
-      "scenario": "agent-log-missing-heading",
-      "fault": "bad heading -> 400 invalid-target",
-      "06": {
-        "emit_tokens": 82,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": false,
-        "duplicates": 0,
-        "silent_failure": true
-      },
-      "07": {
-        "emit_tokens": 22,
-        "claimed_ok": false,
-        "detected": true,
-        "persisted": false,
-        "duplicates": 0,
-        "silent_failure": false
-      }
+  "version": "1.5.1",
+  "date": "2026-07-03",
+  "retrieval": {
+    "current (hybrid+priors, full corpus)": {
+      "precision_at_5": 0.25,
+      "recall_at_5": 1.0,
+      "mrr": 1.0,
+      "session_journal_queries_answered": "2/2",
+      "freshness_top1_correct": true
     },
-    {
-      "scenario": "scope-switch",
-      "fault": "(none)",
-      "06": {
-        "emit_tokens": 84,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": true,
-        "duplicates": 0,
-        "silent_failure": false
-      },
-      "07": {
-        "emit_tokens": 24,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": true,
-        "duplicates": 0,
-        "silent_failure": false
-      }
-    },
-    {
-      "scenario": "inbox-capture-replayed",
-      "fault": "duplicate attempt (retry/replay)",
-      "06": {
-        "emit_tokens": 125,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": true,
-        "duplicates": 1,
-        "silent_failure": true
-      },
-      "07": {
-        "emit_tokens": 33,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": true,
-        "duplicates": 0,
-        "silent_failure": false
-      }
-    },
-    {
-      "scenario": "session-log-flaky-network",
-      "fault": "one-time 503 (transient)",
-      "06": {
-        "emit_tokens": 64,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": false,
-        "duplicates": 0,
-        "silent_failure": true
-      },
-      "07": {
-        "emit_tokens": 17,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": true,
-        "duplicates": 0,
-        "silent_failure": false
-      }
-    },
-    {
-      "scenario": "heartbeat-phantom-write",
-      "fault": "accepted-but-not-persisted",
-      "06": {
-        "emit_tokens": 61,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": false,
-        "duplicates": 0,
-        "silent_failure": true
-      },
-      "07": {
-        "emit_tokens": 14,
-        "claimed_ok": false,
-        "detected": true,
-        "persisted": false,
-        "duplicates": 0,
-        "silent_failure": false
-      }
-    },
-    {
-      "scenario": "cold-start-load-6-reads",
-      "fault": "(none)",
-      "06": {
-        "emit_tokens": 192,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": true,
-        "duplicates": 0,
-        "silent_failure": false
-      },
-      "07": {
-        "emit_tokens": 64,
-        "claimed_ok": true,
-        "detected": false,
-        "persisted": true,
-        "duplicates": 0,
-        "silent_failure": false
-      }
-    }
-  ],
-  "totals": {
-    "0.6": {
-      "gen_tokens": 608,
-      "silent_failures": 4,
-      "detected_failures": 0,
-      "duplicates": 1,
-      "effective_tokens": 6608
-    },
-    "0.7": {
-      "gen_tokens": 174,
-      "silent_failures": 0,
-      "detected_failures": 2,
-      "duplicates": 0,
-      "effective_tokens": 334
+    "baseline (keyword, entities only)": {
+      "precision_at_5": 0.2,
+      "recall_at_5": 0.75,
+      "mrr": 0.75,
+      "session_journal_queries_answered": "0/2",
+      "freshness_top1_correct": false
     }
   },
-  "silent_error_free": {
-    "0.6": "1/5",
-    "0.7": "5/5"
+  "dedup": {
+    "gate ON (v1.5.1 default)": {
+      "duplicate_notes_created": 0,
+      "legitimate_captures_blocked": 0,
+      "referring_attempts": 3,
+      "legit_attempts": 2
+    },
+    "gate OFF (pre-1.5, warn-only)": {
+      "duplicate_notes_created": 3,
+      "legitimate_captures_blocked": 0,
+      "referring_attempts": 3,
+      "legit_attempts": 2
+    }
   },
-  "writes_persisted": {
-    "0.6": "2/5",
-    "0.7": "3/5"
+  "write_safety": {
+    "fault_scenarios": 4,
+    "silent_write_failures": 0,
+    "failures_surfaced_loud": 2
+  },
+  "durability": {
+    "writes_during_outage": 3,
+    "reported_queued": 3,
+    "landed_after_flush": 3,
+    "lost": 0,
+    "duplicated_on_reflush": 0
   }
 }