Add plugin framework and settings UI

packages/db/src/schema/plugin_logs.ts

@@ -0,0 +1,43 @@
+import {
+  pgTable,
+  uuid,
+  text,
+  timestamp,
+  jsonb,
+  index,
+} from "drizzle-orm/pg-core";
+import { plugins } from "./plugins.js";
+
+/**
+ * `plugin_logs` table — structured log storage for plugin workers.
+ *
+ * Each row stores a single log entry emitted by a plugin worker via
+ * `ctx.logger.info(...)` etc. Logs are queryable by plugin, level, and
+ * time range to support the operator logs panel and debugging workflows.
+ *
+ * Rows are inserted by the host when handling `log` notifications from
+ * the worker process. A capped retention policy can be applied via
+ * periodic cleanup (e.g. delete rows older than 7 days).
+ *
+ * @see PLUGIN_SPEC.md §26 — Observability
+ */
+export const pluginLogs = pgTable(
+  "plugin_logs",
+  {
+    id: uuid("id").primaryKey().defaultRandom(),
+    pluginId: uuid("plugin_id")
+      .notNull()
+      .references(() => plugins.id, { onDelete: "cascade" }),
+    level: text("level").notNull().default("info"),
+    message: text("message").notNull(),
+    meta: jsonb("meta").$type<Record<string, unknown>>(),
+    createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+  },
+  (table) => ({
+    pluginTimeIdx: index("plugin_logs_plugin_time_idx").on(
+      table.pluginId,
+      table.createdAt,
+    ),
+    levelIdx: index("plugin_logs_level_idx").on(table.level),
+  }),
+);