feat: evolve retrieval layer with content_type, memory FTS, forget(), and recap references

Extract schema DDL into scripts/schema.sql. Add content_type and is_meta
  columns to messages for transcript control-plane filtering. Introduce
  FTS5-backed memory recall with safe tokenization, memory soft-delete via
  forget() through the renamed --attune runtime, and anchors on memory
  records. Expand query helpers (includeMeta, thread opts, overview
  project-path awareness). Add per-card recap retrieval and writing
  references under references/recap/.

references/recap/pattern5-closing.md

@@ -0,0 +1,35 @@
+# Card 5 Closing Retrieval
+
+Goal: close with a small personal receipt. Use the same period and source scope
+as the recap, or explicitly record a wider metric in `evidence`.
+
+Retrieve:
+
+- one consistent metric that can stand alone, such as streak, active days,
+  sessions, messages, or workflows;
+- one or two compact receipts;
+- most said phrase, only if a real repeated user phrase is supported;
+- signoff material from the period's mood, not a second summary.
+
+For phrase counts, count only non-meta visible user text. For streaks and active
+days, define whether the scope is all Obelisk data, the current project, or the
+selected evidence sessions. Keep the scope consistent with the cover footer
+unless the evidence explicitly says otherwise.
+
+Prefer helpers first. If you need custom SQL for phrase counts, active days, or
+streaks, read `references/schema.md` before writing the SQL.
+
+Avoid:
+
+- naked numbers without units;
+- project report bullets;
+- internal session names;
+- token audits;
+- slogans, advice, or next-action commands.
+
+Read this card's writing file immediately after the closing receipt is chosen:
+`references/recap/writing5-closing.md`. Then update the JSON `closing` card and
+add evidence for counts and phrases.
+This is the final card; save the completed JSON before replying.
+
+Stop when the closing can end the deck without explaining the whole week again.