Add multi-server blueprint collections and atomic launches

src/lib/server/db/schema.sql

@@ -361,6 +361,28 @@ CREATE TABLE IF NOT EXISTS server_launch_recipes (
     blueprint_name TEXT
 );
 
+CREATE TABLE IF NOT EXISTS server_launch_collections (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    created_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS server_collection_members (
+    collection_id TEXT NOT NULL REFERENCES server_launch_collections(id) ON DELETE CASCADE,
+    deployment_id TEXT NOT NULL UNIQUE REFERENCES server_deployments(id) ON DELETE CASCADE,
+    position INTEGER NOT NULL,
+    PRIMARY KEY (collection_id, position)
+);
+
+CREATE TABLE IF NOT EXISTS server_collection_previews (
+    id TEXT PRIMARY KEY,
+    expires_at TEXT NOT NULL,
+    blueprint_name TEXT NOT NULL,
+    entries TEXT NOT NULL,
+    servers TEXT NOT NULL,
+    collection_id TEXT REFERENCES server_launch_collections(id) ON DELETE CASCADE
+);
+
 -- Persist state transitions atomically, including changes made by background workers.
 -- Polls with unchanged status/error do not produce duplicate activity entries.
 CREATE TABLE IF NOT EXISTS beta_events (