feat(03-01): add clients and documents tables to Drizzle schema

- Add pgEnum import and documentStatusEnum (Draft, Sent, Viewed, Signed)
- Add clients table (id, name, email, createdAt, updatedAt)
- Add documents table (id, name, clientId FK, status enum, sentAt, createdAt)
- Generate migration 0001_watery_blindfold.sql and apply to local PostgreSQL

teressa-copeland-homes/drizzle/0001_watery_blindfold.sql

@@ -0,0 +1,19 @@
+CREATE TYPE "public"."document_status" AS ENUM('Draft', 'Sent', 'Viewed', 'Signed');--> statement-breakpoint
+CREATE TABLE "clients" (
+	"id" text PRIMARY KEY NOT NULL,
+	"name" text NOT NULL,
+	"email" text NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "documents" (
+	"id" text PRIMARY KEY NOT NULL,
+	"name" text NOT NULL,
+	"client_id" text NOT NULL,
+	"status" "document_status" DEFAULT 'Draft' NOT NULL,
+	"sent_at" timestamp,
+	"created_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "documents" ADD CONSTRAINT "documents_client_id_clients_id_fk" FOREIGN KEY ("client_id") REFERENCES "public"."clients"("id") ON DELETE cascade ON UPDATE no action;