fix: resolve dev panel and CLI regressions

Synchronize scheduler concurrency across API and gRPC processes and restore persisted limits during recovery.

Serialize subscription mutations and preserve shared storage while cleaning Shell and CLI namespaces, historical references, and filesystem-specific naming candidates.

Handle CLI text responses correctly and include script history in backups. Add regression coverage for concurrency, cleanup ownership, long URLs, Unicode paths, and history exports.

back/protos/cron.ts

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-ts_proto. DO NOT EDIT.
 // versions:
 //   protoc-gen-ts_proto  v2.6.1
-//   protoc               v3.17.3
+//   protoc               v5.28.3
 // source: back/protos/cron.proto
 
 /* eslint-disable */
@@ -48,6 +48,11 @@ export interface DeleteCronRequest {
 export interface DeleteCronResponse {
 }
 
+/** Zero restores the default limit. */
+export interface SetConcurrencyRequest {
+  concurrency: number;
+}
+
 function createBaseISchedule(): ISchedule {
   return { schedule: "" };
 }
@@ -452,6 +457,64 @@ export const DeleteCronResponse: MessageFns<DeleteCronResponse> = {
   },
 };
 
+function createBaseSetConcurrencyRequest(): SetConcurrencyRequest {
+  return { concurrency: 0 };
+}
+
+export const SetConcurrencyRequest: MessageFns<SetConcurrencyRequest> = {
+  encode(message: SetConcurrencyRequest, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.concurrency !== 0) {
+      writer.uint32(8).int32(message.concurrency);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): SetConcurrencyRequest {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseSetConcurrencyRequest();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 8) {
+            break;
+          }
+
+          message.concurrency = reader.int32();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  fromJSON(object: any): SetConcurrencyRequest {
+    return { concurrency: isSet(object.concurrency) ? globalThis.Number(object.concurrency) : 0 };
+  },
+
+  toJSON(message: SetConcurrencyRequest): unknown {
+    const obj: any = {};
+    if (message.concurrency !== 0) {
+      obj.concurrency = Math.round(message.concurrency);
+    }
+    return obj;
+  },
+
+  create<I extends Exact<DeepPartial<SetConcurrencyRequest>, I>>(base?: I): SetConcurrencyRequest {
+    return SetConcurrencyRequest.fromPartial(base ?? ({} as any));
+  },
+  fromPartial<I extends Exact<DeepPartial<SetConcurrencyRequest>, I>>(object: I): SetConcurrencyRequest {
+    const message = createBaseSetConcurrencyRequest();
+    message.concurrency = object.concurrency ?? 0;
+    return message;
+  },
+};
+
 export type CronService = typeof CronService;
 export const CronService = {
   addCron: {
@@ -472,11 +535,21 @@ export const CronService = {
     responseSerialize: (value: DeleteCronResponse) => Buffer.from(DeleteCronResponse.encode(value).finish()),
     responseDeserialize: (value: Buffer) => DeleteCronResponse.decode(value),
   },
+  setConcurrency: {
+    path: "/com.ql.cron.Cron/setConcurrency",
+    requestStream: false,
+    responseStream: false,
+    requestSerialize: (value: SetConcurrencyRequest) => Buffer.from(SetConcurrencyRequest.encode(value).finish()),
+    requestDeserialize: (value: Buffer) => SetConcurrencyRequest.decode(value),
+    responseSerialize: (value: AddCronResponse) => Buffer.from(AddCronResponse.encode(value).finish()),
+    responseDeserialize: (value: Buffer) => AddCronResponse.decode(value),
+  },
 } as const;
 
 export interface CronServer extends UntypedServiceImplementation {
   addCron: handleUnaryCall<AddCronRequest, AddCronResponse>;
   delCron: handleUnaryCall<DeleteCronRequest, DeleteCronResponse>;
+  setConcurrency: handleUnaryCall<SetConcurrencyRequest, AddCronResponse>;
 }
 
 export interface CronClient extends Client {
@@ -510,6 +583,21 @@ export interface CronClient extends Client {
     options: Partial<CallOptions>,
     callback: (error: ServiceError | null, response: DeleteCronResponse) => void,
   ): ClientUnaryCall;
+  setConcurrency(
+    request: SetConcurrencyRequest,
+    callback: (error: ServiceError | null, response: AddCronResponse) => void,
+  ): ClientUnaryCall;
+  setConcurrency(
+    request: SetConcurrencyRequest,
+    metadata: Metadata,
+    callback: (error: ServiceError | null, response: AddCronResponse) => void,
+  ): ClientUnaryCall;
+  setConcurrency(
+    request: SetConcurrencyRequest,
+    metadata: Metadata,
+    options: Partial<CallOptions>,
+    callback: (error: ServiceError | null, response: AddCronResponse) => void,
+  ): ClientUnaryCall;
 }
 
 export const CronClient = makeGenericClientConstructor(CronService, "com.ql.cron.Cron") as unknown as {