redfish: add service root to critical endpoints, tolerate missing root in replay

Add /redfish/v1 to redfishCriticalEndpoints so plan-B retries the service
root if it failed during the main crawl. Also downgrade the missing-root
error in ReplayRedfishFromRawPayloads from fatal to a warning so analysis
can complete with defaults when the root doc was not recovered.

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

internal/collector/redfish.go

@@ -1439,6 +1439,7 @@ func redfishCriticalEndpoints(systemPaths, chassisPaths, managerPaths []string)
 		add(p)
 		add(joinPath(p, "/NetworkProtocol"))
 	}
+	add("/redfish/v1")
 	add("/redfish/v1/UpdateService")
 	add("/redfish/v1/UpdateService/FirmwareInventory")
 	return out

internal/collector/redfish_replay.go

@@ -3,6 +3,7 @@ package collector
 import (
 	"encoding/json"
 	"fmt"
+	"log"
 	"sort"
 	"strings"
 	"time"
@@ -30,7 +31,7 @@ func ReplayRedfishFromRawPayloads(rawPayloads map[string]any, emit ProgressFn) (
 		emit(Progress{Status: "running", Progress: 10, Message: "Redfish snapshot: replay service root..."})
 	}
 	if _, err := r.getJSON("/redfish/v1"); err != nil {
-		return nil, fmt.Errorf("redfish service root: %w", err)
+		log.Printf("redfish replay: service root /redfish/v1 missing from snapshot, continuing with defaults: %v", err)
 	}
 
 	systemPaths := r.discoverMemberPaths("/redfish/v1/Systems", "/redfish/v1/Systems/1")