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/drizzle/meta/_journal.json

@@ -50,6 +50,13 @@
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       "tag": "0006_type_discriminant",
       "breakpoints": true
+    },
+    {
+      "idx": 7,
+      "version": "7",
+      "when": 1774116777513,
+      "tag": "0007_equal_nekra",
+      "breakpoints": true
     }
   ]
 }