Add exclusive map ownership and capacity-aware autoscaling creation

src/lib/server/db/index.ts

@@ -276,7 +276,7 @@ function migrateWatchdogConstraints(handle: Database.Database): void {
     for (const name of ['provisioning_sources', 'deployment_servers']) {
         const { sql } = handle.prepare("SELECT sql FROM sqlite_master WHERE type = 'table' AND name = ?").get(name) as { sql: string };
         const replacement = name === 'provisioning_sources'
-            ? (sql.includes("'watchdog'") ? sql : sql.replace("'campaign','beta','maintenance'", "'campaign','beta','maintenance','watchdog'"))
+            ? (sql.includes("'autoscaling'") ? sql : sql.replace(/'campaign','beta','maintenance'(?:,'watchdog')?/, "'campaign','beta','maintenance','watchdog','autoscaling'"))
             : sql.replace(/server\s+TEXT NOT NULL REFERENCES servers\(name\)/, 'server TEXT NOT NULL');
         if (sql === replacement) continue;
         const dependent = handle.prepare("SELECT sql FROM sqlite_master WHERE tbl_name = ? AND type IN ('index','trigger') AND sql IS NOT NULL")

src/lib/server/db/schema.sql

@@ -527,7 +527,7 @@ CREATE TABLE IF NOT EXISTS server_rebuild_jobs (
 -- history retention, while current pointers live on the caller's server rows.
 CREATE TABLE IF NOT EXISTS provisioning_sources (
     operation_id TEXT NOT NULL REFERENCES server_deployments(id) ON DELETE CASCADE,
-    kind TEXT NOT NULL CHECK (kind IN ('campaign','beta','maintenance','watchdog')),
+    kind TEXT NOT NULL CHECK (kind IN ('campaign','beta','maintenance','watchdog','autoscaling')),
     source_id TEXT NOT NULL,
     server TEXT NOT NULL,
     PRIMARY KEY (operation_id, kind, source_id, server)