feat(collect): remove power-on/off, add skip-hung for Redfish collection

Remove power-on and power-off functionality from the Redfish collector;
keep host power-state detection and show a warning in the UI when the
host is powered off before collection starts.

Add a "Пропустить зависшие" (skip hung) button that lets the user abort
stuck Redfish collection phases without losing already-collected data.
Introduces a two-level context model in Collect(): the outer job context
covers the full lifecycle including replay; an inner collectCtx covers
snapshot, prefetch, and plan-B phases only. Closing the skipCh cancels
collectCtx immediately — aborts all in-flight HTTP requests and exits
plan-B loops — then replay runs on whatever rawTree was collected.

Signal path: UI → POST /api/collect/{id}/skip → JobManager.SkipJob()
→ close(skipCh) → goroutine in Collect() → cancelCollect().

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/server/handlers.go

@@ -18,6 +18,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 	"sync/atomic"
 	"time"
 
@@ -1674,34 +1675,28 @@ func (s *Server) handleCollectProbe(w http.ResponseWriter, r *http.Request) {
 
 	message := "Связь с BMC установлена"
 	if result != nil {
-		switch {
-		case !result.HostPoweredOn && result.PowerControlAvailable:
-			message = "Связь с BMC установлена, host выключен. Можно включить перед сбором."
-		case !result.HostPoweredOn:
-			message = "Связь с BMC установлена, host выключен."
-		default:
-			message = "Связь с BMC установлена, host включен."
+		if result.HostPoweredOn {
+			message = "Связь с BMC установлена, host включён."
+		} else {
+			message = "Связь с BMC установлена, host выключен. Данные инвентаря могут быть неполными."
 		}
 	}
 
 	hostPowerState := ""
 	hostPoweredOn := false
-	powerControlAvailable := false
 	reachable := false
 	if result != nil {
 		reachable = result.Reachable
 		hostPowerState = strings.TrimSpace(result.HostPowerState)
 		hostPoweredOn = result.HostPoweredOn
-		powerControlAvailable = result.PowerControlAvailable
 	}
 
 	jsonResponse(w, CollectProbeResponse{
-		Reachable:             reachable,
-		Protocol:              req.Protocol,
-		HostPowerState:        hostPowerState,
-		HostPoweredOn:         hostPoweredOn,
-		PowerControlAvailable: powerControlAvailable,
-		Message:               message,
+		Reachable:      reachable,
+		Protocol:       req.Protocol,
+		HostPowerState: hostPowerState,
+		HostPoweredOn:  hostPoweredOn,
+		Message:        message,
 	})
 }
 
@@ -1737,6 +1732,22 @@ func (s *Server) handleCollectCancel(w http.ResponseWriter, r *http.Request) {
 	jsonResponse(w, job.toStatusResponse())
 }
 
+func (s *Server) handleCollectSkip(w http.ResponseWriter, r *http.Request) {
+	jobID := strings.TrimSpace(r.PathValue("id"))
+	if !isValidCollectJobID(jobID) {
+		jsonError(w, "Invalid collect job id", http.StatusBadRequest)
+		return
+	}
+
+	job, ok := s.jobManager.SkipJob(jobID)
+	if !ok {
+		jsonError(w, "Collect job not found", http.StatusNotFound)
+		return
+	}
+
+	jsonResponse(w, job.toStatusResponse())
+}
+
 func (s *Server) startCollectionJob(jobID string, req CollectRequest) {
 	ctx, cancel := context.WithCancel(context.Background())
 	if attached := s.jobManager.AttachJobCancel(jobID, cancel); !attached {
@@ -1744,6 +1755,11 @@ func (s *Server) startCollectionJob(jobID string, req CollectRequest) {
 		return
 	}
 
+	skipCh := make(chan struct{})
+	var skipOnce sync.Once
+	skipFn := func() { skipOnce.Do(func() { close(skipCh) }) }
+	s.jobManager.AttachJobSkip(jobID, skipFn)
+
 	go func() {
 		connector, ok := s.getCollector(req.Protocol)
 		if !ok {
@@ -1811,7 +1827,9 @@ func (s *Server) startCollectionJob(jobID string, req CollectRequest) {
 			}
 		}
 
-		result, err := connector.Collect(ctx, toCollectorRequest(req), emitProgress)
+		collectorReq := toCollectorRequest(req)
+		collectorReq.SkipHungCh = skipCh
+		result, err := connector.Collect(ctx, collectorReq, emitProgress)
 		if err != nil {
 			if ctx.Err() != nil {
 				return
@@ -2035,9 +2053,7 @@ func toCollectorRequest(req CollectRequest) collector.Request {
 		Password:             req.Password,
 		Token:                req.Token,
 		TLSMode:              req.TLSMode,
-		PowerOnIfHostOff:     req.PowerOnIfHostOff,
-		StopHostAfterCollect: req.StopHostAfterCollect,
-		DebugPayloads:        req.DebugPayloads,
+		DebugPayloads: req.DebugPayloads,
 	}
 }