panel public release

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

controller/internal/db/migrations/005_backups.sql

@@ -0,0 +1,18 @@
+-- 005_backups.sql — instance backups (tar.gz of volumes).
+--
+-- The agent writes the archive to disk under its --backup-dir and
+-- reports back path + size. Controller persists the row so operators
+-- can list / restore / delete later.
+
+CREATE TABLE backups (
+    id            TEXT PRIMARY KEY,                              -- bkp_<hex16>
+    instance_id   TEXT NOT NULL,
+    agent_id      TEXT NOT NULL,
+    path          TEXT NOT NULL,                                 -- absolute path on the agent
+    size_bytes    BIGINT NOT NULL DEFAULT 0,
+    description   TEXT NOT NULL DEFAULT '',
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_backups_instance ON backups(instance_id);
+CREATE INDEX idx_backups_created  ON backups(created_at DESC);