feat: convert tmux monitoring into a plugin (B10)

plugins/tmux-monitor/src/backend/tables.ts

@@ -0,0 +1,32 @@
+import {
+  adoptLegacyTable,
+  defineTable,
+  id,
+  refHost,
+  refUser,
+  text,
+  timestamp,
+} from "@termix/plugin-sdk/db";
+
+/**
+ * A user's tags on a tmux session, per host. Sessions are shared on the host
+ * itself, but tags are per user: everyone who monitors the same host can tag
+ * the same session differently.
+ *
+ * Adopted from core's tmux_session_tags, so the column names are the legacy
+ * ones and the rename carries every existing row across. Core never indexed
+ * it, so there is no legacy index to keep.
+ */
+export const sessionTags = adoptLegacyTable(
+  "tmux_session_tags",
+  defineTable("session_tags", {
+    id: id(),
+    userId: refUser(),
+    hostId: refHost(),
+    sessionName: text().notNull(),
+    tag: text().notNull(),
+    createdAt: timestamp().notNull().defaultNow(),
+  }),
+);
+
+export const tables = [sessionTags];