feat(09-01): add property_address column to clients — schema, migration, server actions

- Add propertyAddress: text("property_address") nullable column to clients pgTable
- Generate migration drizzle/0007_equal_nekra.sql: ALTER TABLE "clients" ADD COLUMN "property_address" text
- Apply migration successfully to local postgres database
- Extend clientSchema Zod schema with propertyAddress: z.string().optional()
- createClient: persist propertyAddress || null to coerce empty string to NULL
- updateClient: persist propertyAddress || null alongside name, email, updatedAt

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

@@ -55,6 +55,7 @@ export const clients = pgTable("clients", {
   id: text("id").primaryKey().$defaultFn(() => crypto.randomUUID()),
   name: text("name").notNull(),
   email: text("email").notNull(),
+  propertyAddress: text("property_address"),
   createdAt: timestamp("created_at").defaultNow().notNull(),
   updatedAt: timestamp("updated_at").defaultNow().notNull(),
 });