feat(05-01): extend documents schema with 4 new columns + migration 0003

- Added SignatureFieldData interface export to schema.ts
- Added signatureFields (jsonb), textFillData (jsonb), assignedClientId (text), preparedFilePath (text) nullable columns to documents table
- Added jsonb import to drizzle-orm/pg-core imports
- Generated and applied migration 0003_cool_natasha_romanoff.sql

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

teressa-copeland-homes/src/lib/db/schema.ts

@@ -1,6 +1,15 @@
-import { pgEnum, pgTable, text, timestamp } from "drizzle-orm/pg-core";
+import { jsonb, pgEnum, pgTable, text, timestamp } from "drizzle-orm/pg-core";
 import { relations } from "drizzle-orm";
 
+export interface SignatureFieldData {
+  id: string;
+  page: number;   // 1-indexed
+  x: number;      // PDF user space, bottom-left origin, points
+  y: number;      // PDF user space, bottom-left origin, points
+  width: number;  // PDF points (default: 144 — 2 inches)
+  height: number; // PDF points (default: 36 — 0.5 inches)
+}
+
 export const users = pgTable("users", {
   id: text("id").primaryKey().$defaultFn(() => crypto.randomUUID()),
   email: text("email").notNull().unique(),
@@ -42,6 +51,10 @@ export const documents = pgTable("documents", {
   createdAt: timestamp("created_at").defaultNow().notNull(),
   formTemplateId: text("form_template_id").references(() => formTemplates.id),
   filePath: text("file_path"),
+  signatureFields: jsonb("signature_fields").$type<SignatureFieldData[]>(),
+  textFillData: jsonb("text_fill_data").$type<Record<string, string>>(),
+  assignedClientId: text("assigned_client_id"),
+  preparedFilePath: text("prepared_file_path"),
 });
 
 export const documentsRelations = relations(documents, ({ one }) => ({