feat(documents): prepare inbox suggestions and add entity assignments

backend/db/schema/scanner_inbox.ts

@@ -1,6 +1,7 @@
-import { bigint, boolean, index, pgTable, text, timestamp, uniqueIndex, uuid } from "drizzle-orm/pg-core"
+import { bigint, boolean, index, jsonb, pgTable, text, timestamp, uniqueIndex, uuid } from "drizzle-orm/pg-core"
 import { tenants } from "./tenants"
 import { files } from "./files"
+import { sql } from "drizzle-orm"
 
 export const scannerInboxConnections = pgTable("scanner_inbox_connections", {
     tenantId: bigint("tenant_id", { mode: "number" }).primaryKey().references(() => tenants.id, { onDelete: "cascade" }),
@@ -18,7 +19,13 @@ export const scannerInboxDocuments = pgTable("scanner_inbox_documents", {
     checksum: text("checksum").notNull(),
     receivedAt: timestamp("received_at", { withTimezone: true }).notNull().defaultNow(),
     filedAt: timestamp("filed_at", { withTimezone: true }),
+    suggestionStatus: text("suggestion_status").notNull().default("pending"),
+    suggestion: jsonb("suggestion"),
+    suggestionMessage: text("suggestion_message"),
+    suggestionClaim: uuid("suggestion_claim"),
+    suggestionUpdatedAt: timestamp("suggestion_updated_at", { withTimezone: true }).notNull().defaultNow(),
 }, table => ({
     filenameKey: uniqueIndex("scanner_inbox_documents_filename_key").on(table.tenantId, table.remoteFilename),
     receivedIdx: index("scanner_inbox_documents_received_idx").on(table.tenantId, table.receivedAt),
+    suggestionQueueIdx: index("scanner_inbox_suggestion_queue_idx").on(table.suggestionStatus, table.suggestionUpdatedAt, table.receivedAt).where(sql`${table.filedAt} IS NULL`),
 }))