Initial boilerplate scaffold for continuum-backend

Bun + ElysiaJS control plane: Drizzle/Postgres schema (printers, farms,
print_jobs, pgvector frame_embeddings), R2 presigned URLs, Redis Streams
frame ingestion queue, REST routes, and the /ws/edge/v1 edge-gateway
WebSocket uplink.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/db/schema/farms.ts

@@ -0,0 +1,15 @@
+import { pgTable, uuid, text, timestamp, jsonb } from "drizzle-orm/pg-core";
+
+export const farms = pgTable("farms", {
+  id: uuid("id").primaryKey().defaultRandom(),
+  name: text("name").notNull(),
+  ownerId: uuid("owner_id").notNull(),
+  edgeProxyToken: text("edge_proxy_token").notNull(),
+  location: text("location"),
+  settings: jsonb("settings").$type<Record<string, unknown>>().default({}),
+  createdAt: timestamp("created_at", { withTimezone: true }).defaultNow().notNull(),
+  updatedAt: timestamp("updated_at", { withTimezone: true }).defaultNow().notNull(),
+});
+
+export type Farm = typeof farms.$inferSelect;
+export type NewFarm = typeof farms.$inferInsert;