Admin UI add maintenance menu (#6944)

* add ui for maintenance

* valid config loading. fix workers page.

* refactor

* grpc between admin and workers

* add a long-running bidirectional grpc call between admin and worker
* use the grpc call to heartbeat
* use the grpc call to communicate
* worker can remove the http client
* admin uses http port + 10000 as its default grpc port

* one task one package

* handles connection failures gracefully with exponential backoff

* grpc with insecure tls

* grpc with optional tls

* fix detecting tls

* change time config from nano seconds to seconds

* add tasks with 3 interfaces

* compiles reducing hard coded

* remove a couple of tasks

* remove hard coded references

* reduce hard coded values

* remove hard coded values

* remove hard coded from templ

* refactor maintenance package

* fix import cycle

* simplify

* simplify

* auto register

* auto register factory

* auto register task types

* self register types

* refactor

* simplify

* remove one task

* register ui

* lazy init executor factories

* use registered task types

* DefaultWorkerConfig remove hard coded task types

* remove more hard coded

* implement get maintenance task

* dynamic task configuration

* "System Settings" should only have system level settings

* adjust menu for tasks

* ensure menu not collapsed

* render job configuration well

* use templ for ui of task configuration

* fix ordering

* fix bugs

* saving duration in seconds

* use value and unit for duration

* Delete WORKER_REFACTORING_PLAN.md

* Delete maintenance.json

* Delete custom_worker_example.go

* remove address from workers

* remove old code from ec task

* remove creating collection button

* reconnect with exponential backoff

* worker use security.toml

* start admin server with tls info from security.toml

* fix "weed admin" cli description

weed/worker/tasks/vacuum/vacuum_scheduler.go

@@ -0,0 +1,111 @@
+package vacuum
+
+import (
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/weed/worker/types"
+)
+
+// VacuumScheduler implements vacuum task scheduling using code instead of schemas
+type VacuumScheduler struct {
+	enabled       bool
+	maxConcurrent int
+	minInterval   time.Duration
+}
+
+// Compile-time interface assertions
+var (
+	_ types.TaskScheduler = (*VacuumScheduler)(nil)
+)
+
+// NewVacuumScheduler creates a new simple vacuum scheduler
+func NewVacuumScheduler() *VacuumScheduler {
+	return &VacuumScheduler{
+		enabled:       true,
+		maxConcurrent: 2,
+		minInterval:   6 * time.Hour,
+	}
+}
+
+// GetTaskType returns the task type
+func (s *VacuumScheduler) GetTaskType() types.TaskType {
+	return types.TaskTypeVacuum
+}
+
+// CanScheduleNow determines if a vacuum task can be scheduled right now
+func (s *VacuumScheduler) CanScheduleNow(task *types.Task, runningTasks []*types.Task, availableWorkers []*types.Worker) bool {
+	// Check if scheduler is enabled
+	if !s.enabled {
+		return false
+	}
+
+	// Check concurrent limit
+	runningVacuumCount := 0
+	for _, runningTask := range runningTasks {
+		if runningTask.Type == types.TaskTypeVacuum {
+			runningVacuumCount++
+		}
+	}
+
+	if runningVacuumCount >= s.maxConcurrent {
+		return false
+	}
+
+	// Check if there's an available worker with vacuum capability
+	for _, worker := range availableWorkers {
+		if worker.CurrentLoad < worker.MaxConcurrent {
+			for _, capability := range worker.Capabilities {
+				if capability == types.TaskTypeVacuum {
+					return true
+				}
+			}
+		}
+	}
+
+	return false
+}
+
+// GetPriority returns the priority for this task
+func (s *VacuumScheduler) GetPriority(task *types.Task) types.TaskPriority {
+	// Could adjust priority based on task parameters
+	if params, ok := task.Parameters["garbage_ratio"].(float64); ok {
+		if params > 0.8 {
+			return types.TaskPriorityHigh
+		}
+	}
+	return task.Priority
+}
+
+// GetMaxConcurrent returns max concurrent tasks of this type
+func (s *VacuumScheduler) GetMaxConcurrent() int {
+	return s.maxConcurrent
+}
+
+// GetDefaultRepeatInterval returns the default interval to wait before repeating vacuum tasks
+func (s *VacuumScheduler) GetDefaultRepeatInterval() time.Duration {
+	return s.minInterval
+}
+
+// IsEnabled returns whether this scheduler is enabled
+func (s *VacuumScheduler) IsEnabled() bool {
+	return s.enabled
+}
+
+// Configuration setters
+
+func (s *VacuumScheduler) SetEnabled(enabled bool) {
+	s.enabled = enabled
+}
+
+func (s *VacuumScheduler) SetMaxConcurrent(max int) {
+	s.maxConcurrent = max
+}
+
+func (s *VacuumScheduler) SetMinInterval(interval time.Duration) {
+	s.minInterval = interval
+}
+
+// GetMinInterval returns the minimum interval
+func (s *VacuumScheduler) GetMinInterval() time.Duration {
+	return s.minInterval
+}