Admin: misc improvements on admin server and workers. EC now works. (#7055)

* initial design

* added simulation as tests

* reorganized the codebase to move the simulation framework and tests into their own dedicated package

* integration test. ec worker task

* remove "enhanced" reference

* start master, volume servers, filer

Current Status
✅ Master: Healthy and running (port 9333)
✅ Filer: Healthy and running (port 8888)
✅ Volume Servers: All 6 servers running (ports 8080-8085)
🔄 Admin/Workers: Will start when dependencies are ready

* generate write load

* tasks are assigned

* admin start wtih grpc port. worker has its own working directory

* Update .gitignore

* working worker and admin. Task detection is not working yet.

* compiles, detection uses volumeSizeLimitMB from master

* compiles

* worker retries connecting to admin

* build and restart

* rendering pending tasks

* skip task ID column

* sticky worker id

* test canScheduleTaskNow

* worker reconnect to admin

* clean up logs

* worker register itself first

* worker can run ec work and report status

but:
1. one volume should not be repeatedly worked on.
2. ec shards needs to be distributed and source data should be deleted.

* move ec task logic

* listing ec shards

* local copy, ec. Need to distribute.

* ec is mostly working now

* distribution of ec shards needs improvement
* need configuration to enable ec

* show ec volumes

* interval field UI component

* rename

* integration test with vauuming

* garbage percentage threshold

* fix warning

* display ec shard sizes

* fix ec volumes list

* Update ui.go

* show default values

* ensure correct default value

* MaintenanceConfig use ConfigField

* use schema defined defaults

* config

* reduce duplication

* refactor to use BaseUIProvider

* each task register its schema

* checkECEncodingCandidate use ecDetector

* use vacuumDetector

* use volumeSizeLimitMB

* remove

remove

* remove unused

* refactor

* use new framework

* remove v2 reference

* refactor

* left menu can scroll now

* The maintenance manager was not being initialized when no data directory was configured for persistent storage.

* saving config

* Update task_config_schema_templ.go

* enable/disable tasks

* protobuf encoded task configurations

* fix system settings

* use ui component

* remove logs

* interface{} Reduction

* reduce interface{}

* reduce interface{}

* avoid from/to map

* reduce interface{}

* refactor

* keep it DRY

* added logging

* debug messages

* debug level

* debug

* show the log caller line

* use configured task policy

* log level

* handle admin heartbeat response

* Update worker.go

* fix EC rack and dc count

* Report task status to admin server

* fix task logging, simplify interface checking, use erasure_coding constants

* factor in empty volume server during task planning

* volume.list adds disk id

* track disk id also

* fix locking scheduled and manual scanning

* add active topology

* simplify task detector

* ec task completed, but shards are not showing up

* implement ec in ec_typed.go

* adjust log level

* dedup

* implementing ec copying shards and only ecx files

* use disk id when distributing ec shards

🎯 Planning: ActiveTopology creates DestinationPlan with specific TargetDisk
📦 Task Creation: maintenance_integration.go creates ECDestination with DiskId
🚀 Task Execution: EC task passes DiskId in VolumeEcShardsCopyRequest
💾 Volume Server: Receives disk_id and stores shards on specific disk (vs.store.Locations[req.DiskId])
📂 File System: EC shards and metadata land in the exact disk directory planned

* Delete original volume from all locations

* clean up existing shard locations

* local encoding and distributing

* Update docker/admin_integration/EC-TESTING-README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* check volume id range

* simplify

* fix tests

* fix types

* clean up logs and tests

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/admin/maintenance/maintenance_worker.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
+	"github.com/seaweedfs/seaweedfs/weed/worker"
 	"github.com/seaweedfs/seaweedfs/weed/worker/tasks"
 	"github.com/seaweedfs/seaweedfs/weed/worker/types"
 
@@ -145,15 +146,20 @@ func NewMaintenanceWorkerService(workerID, address, adminServer string) *Mainten
 func (mws *MaintenanceWorkerService) executeGenericTask(task *MaintenanceTask) error {
 	glog.V(2).Infof("Executing generic task %s: %s for volume %d", task.ID, task.Type, task.VolumeID)
 
+	// Validate that task has proper typed parameters
+	if task.TypedParams == nil {
+		return fmt.Errorf("task %s has no typed parameters - task was not properly planned (insufficient destinations)", task.ID)
+	}
+
 	// Convert MaintenanceTask to types.TaskType
 	taskType := types.TaskType(string(task.Type))
 
 	// Create task parameters
 	taskParams := types.TaskParams{
-		VolumeID:   task.VolumeID,
-		Server:     task.Server,
-		Collection: task.Collection,
-		Parameters: task.Parameters,
+		VolumeID:    task.VolumeID,
+		Server:      task.Server,
+		Collection:  task.Collection,
+		TypedParams: task.TypedParams,
 	}
 
 	// Create task instance using the registry
@@ -396,10 +402,19 @@ func NewMaintenanceWorkerCommand(workerID, address, adminServer string) *Mainten
 
 // Run starts the maintenance worker as a standalone service
 func (mwc *MaintenanceWorkerCommand) Run() error {
-	// Generate worker ID if not provided
+	// Generate or load persistent worker ID if not provided
 	if mwc.workerService.workerID == "" {
-		hostname, _ := os.Hostname()
-		mwc.workerService.workerID = fmt.Sprintf("worker-%s-%d", hostname, time.Now().Unix())
+		// Get current working directory for worker ID persistence
+		wd, err := os.Getwd()
+		if err != nil {
+			return fmt.Errorf("failed to get working directory: %w", err)
+		}
+
+		workerID, err := worker.GenerateOrLoadWorkerID(wd)
+		if err != nil {
+			return fmt.Errorf("failed to generate or load worker ID: %w", err)
+		}
+		mwc.workerService.workerID = workerID
 	}
 
 	// Start the worker service