Index lifecycle capacity checks instead of scanning retained jobs

src/lib/server/backends/schema.ts

@@ -23,6 +23,7 @@ export function migrateNativeInstances(handle: Database.Database): void {
             applied_at TEXT, verified_at TEXT
         );
         CREATE INDEX IF NOT EXISTS native_provisioning_instance ON native_provisioning(instance_id);
+        CREATE INDEX IF NOT EXISTS native_provisioning_operation ON native_provisioning(operation_id, deployment_id);
         CREATE TABLE IF NOT EXISTS provisioning_safety_overrides (
             deployment_id TEXT PRIMARY KEY REFERENCES server_deployments(id) ON DELETE CASCADE,
             actor_id TEXT NOT NULL, actor_name TEXT NOT NULL, confirmed_at TEXT NOT NULL
@@ -35,6 +36,7 @@ export function migrateNativeInstances(handle: Database.Database): void {
         );
         CREATE INDEX IF NOT EXISTS ec_host_migrations_source ON ec_host_migrations(source_host_id);
         CREATE INDEX IF NOT EXISTS ec_host_migrations_target ON ec_host_migrations(target_host_id);
+        CREATE INDEX IF NOT EXISTS ec_host_migrations_operation ON ec_host_migrations(remove_operation_id, deployment_id);
         CREATE TABLE IF NOT EXISTS native_creation_cancellations (
             creation_id TEXT PRIMARY KEY REFERENCES server_deployments(id),
             cleanup_id TEXT NOT NULL UNIQUE REFERENCES server_deployments(id)