Add multi_entry_ordering column to bulk_address_uploads

Additive nullable jsonb column for the user-confirmed building-part ordering
(ADR-0004, issue #297), generated off main. No data migration. The jsonb shape
type is co-located with the column so the schema is self-contained.

Split out as its own migration PR so the DB change can be approved and deployed
independently of the feature's app code.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/db/migrations/0218_natural_umar.sql

@@ -0,0 +1 @@
+ALTER TABLE "bulk_address_uploads" ADD COLUMN "multi_entry_ordering" jsonb;

src/app/db/migrations/meta/_journal.json

@@ -1527,6 +1527,13 @@
       "when": 1780404222902,
       "tag": "0217_gray_hellion",
       "breakpoints": true
+    },
+    {
+      "idx": 218,
+      "version": "7",
+      "when": 1780408378351,
+      "tag": "0218_natural_umar",
+      "breakpoints": true
     }
   ]
 }

src/app/db/schema/bulk_address_uploads.ts

@@ -25,6 +25,17 @@ export interface MultiEntrySummary {
   sample: MultiEntrySample | null;
 }
 
+// User-confirmed building-part ordering (ADR-0004). Keyed by entry-count so it
+// can hold more than one count later; this iteration populates only the
+// largest. permutations[count][k] = the 0-based file position holding building
+// part k, where 0 = Main building, 1..N-1 = Extension 1..N-1.
+// e.g. { "2": [1, 0] } => for 2-part rows the main building is file position 1.
+export interface MultiEntryOrdering {
+  permutations: Record<string, number[]>;
+  // Set once the user confirms; gates Finalise when the upload is multi-entry.
+  confirmed: boolean;
+}
+
 export const bulkAddressUploads = pgTable("bulk_address_uploads", {
   id: uuid("id").defaultRandom().primaryKey(),
   portfolioId: text("portfolio_id").notNull(),
@@ -38,6 +49,8 @@ export const bulkAddressUploads = pgTable("bulk_address_uploads", {
   // Multi-entry building-part detection, computed at start-address-matching
   // and read by the awaiting_review review surface (ADR-0004).
   multiEntrySummary: jsonb("multi_entry_summary").$type<MultiEntrySummary>(),
+  // User-confirmed building-part ordering for the multi-entry sample (ADR-0004).
+  multiEntryOrdering: jsonb("multi_entry_ordering").$type<MultiEntryOrdering>(),
   taskId: uuid("task_id"),
   combinedOutputS3Uri: text("combined_output_s3_uri"),
   createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),