Add plugin framework and settings UI

packages/db/src/schema/plugin_config.ts

@@ -0,0 +1,30 @@
+import { pgTable, uuid, text, timestamp, jsonb, uniqueIndex } from "drizzle-orm/pg-core";
+import { plugins } from "./plugins.js";
+
+/**
+ * `plugin_config` table — stores operator-provided instance configuration
+ * for each plugin (one row per plugin, enforced by a unique index on
+ * `plugin_id`).
+ *
+ * The `config_json` column holds the values that the operator enters in the
+ * plugin settings UI. These values are validated at runtime against the
+ * plugin's `instanceConfigSchema` from the manifest.
+ *
+ * @see PLUGIN_SPEC.md §21.3
+ */
+export const pluginConfig = pgTable(
+  "plugin_config",
+  {
+    id: uuid("id").primaryKey().defaultRandom(),
+    pluginId: uuid("plugin_id")
+      .notNull()
+      .references(() => plugins.id, { onDelete: "cascade" }),
+    configJson: jsonb("config_json").$type<Record<string, unknown>>().notNull().default({}),
+    lastError: text("last_error"),
+    createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+    updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
+  },
+  (table) => ({
+    pluginIdIdx: uniqueIndex("plugin_config_plugin_id_idx").on(table.pluginId),
+  }),
+);