feat: add quality_review task status and qualityReview initiative flag

Adds two new fields to the database and propagates them through the
repository layer:

- Task status enum gains 'quality_review' (between in_progress and
  completed), enabling a QA gate before tasks are marked complete.
- initiatives.quality_review (INTEGER DEFAULT 0) lets an initiative be
  flagged for quality-review workflow without a data migration (existing
  rows default to false).

Includes:
- Schema changes in schema.ts
- Migration 0037 (ALTER TABLE initiatives ADD quality_review)
- Snapshot chain repaired: deleted stale 0036 snapshot, fixed 0035
  prevId to create a linear chain (0032 → 0034 → 0035), then generated
  clean 0037 snapshot
- Repository adapter already uses SELECT * / spread-update pattern so
  no adapter code changes were needed
- Initiative and task repository tests extended with qualityReview /
  quality_review_status describe blocks (7 new tests)
- docs/database.md updated

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/server/drizzle/0037_worthless_princess_powerful.sql

@@ -0,0 +1 @@
+ALTER TABLE `initiatives` ADD `quality_review` integer DEFAULT false NOT NULL;

apps/server/drizzle/meta/0035_snapshot.json

@@ -2,7 +2,7 @@
   "version": "6",
   "dialect": "sqlite",
   "id": "c84e499f-7df8-4091-b2a5-6b12847898bd",
-  "prevId": "5fbe1151-1dfb-4b0c-a7fa-2177369543fd",
+  "prevId": "443071fe-31d6-498a-9f4a-4a3ff24a46fc",
   "tables": {
     "accounts": {
       "name": "accounts",
@@ -238,6 +238,13 @@
           "notNull": false,
           "autoincrement": false
         },
+        "prompt": {
+          "name": "prompt",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
         "exit_code": {
           "name": "exit_code",
           "type": "integer",

apps/server/drizzle/meta/_journal.json

@@ -260,6 +260,13 @@
       "when": 1772798869413,
       "tag": "0036_icy_silvermane",
       "breakpoints": true
+    },
+    {
+      "idx": 37,
+      "version": "6",
+      "when": 1772829916655,
+      "tag": "0037_worthless_princess_powerful",
+      "breakpoints": true
     }
   ]
-}
+}