v0.4.0: monitoring & backup — scheduler, CPU/temp metrics, healthchecks, restic backups

Phase 2 (Monitoring & Health):
- Central job scheduler replacing ad-hoc goroutines (internal/scheduler)
- CPU usage collector via /proc/stat background sampling (internal/system/cpu_linux.go)
- Temperature reading from /sys/class/thermal + /host/sys (Docker mount)
- Load average from /proc/loadavg
- Healthchecks.io-compatible HTTP pinger (internal/monitor/pinger.go)
- System health checks: disk, memory, CPU, temp, Docker, protected containers (internal/monitor/healthcheck.go)

Phase 3 (Backups):
- Database auto-discovery via docker ps + docker inspect (internal/backup/dbdump.go)
- Database dumping via docker exec (pg_dump / mariadb-dump) with atomic writes
- Restic backup integration with auto-password generation (internal/backup/restic.go)
- Backup orchestrator: DB dumps + restic snapshots + weekly prune (internal/backup/backup.go)
- Manual backup trigger via dashboard button and POST /api/backup/run

Dashboard UI:
- CPU usage bar with load average display
- Temperature with colored indicator dot
- Backup status card with last run time, DB count, repo stats
- "Mentés most" button for manual backup trigger

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

controller/internal/web/server.go

@@ -10,28 +10,34 @@ import (
 	"strings"
 	"sync"
 
+	"gitea.dooplex.hu/admin/felhom-controller/internal/backup"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/config"
 	"gitea.dooplex.hu/admin/felhom-controller/internal/stacks"
+	"gitea.dooplex.hu/admin/felhom-controller/internal/system"
 )
 
 type Server struct {
-	cfg      *config.Config
-	stackMgr *stacks.Manager
-	logger   *log.Logger
-	version  string
-	tmpl     *template.Template
+	cfg          *config.Config
+	stackMgr     *stacks.Manager
+	cpuCollector *system.CPUCollector
+	backupMgr    *backup.Manager
+	logger       *log.Logger
+	version      string
+	tmpl         *template.Template
 
 	sessions   map[string]*session
 	sessionsMu sync.RWMutex
 }
 
-func NewServer(cfg *config.Config, stackMgr *stacks.Manager, logger *log.Logger, version string) *Server {
+func NewServer(cfg *config.Config, stackMgr *stacks.Manager, cpuCollector *system.CPUCollector, backupMgr *backup.Manager, logger *log.Logger, version string) *Server {
 	s := &Server{
-		cfg:      cfg,
-		stackMgr: stackMgr,
-		logger:   logger,
-		version:  version,
-		sessions: make(map[string]*session),
+		cfg:          cfg,
+		stackMgr:     stackMgr,
+		cpuCollector: cpuCollector,
+		backupMgr:    backupMgr,
+		logger:       logger,
+		version:      version,
+		sessions:     make(map[string]*session),
 	}
 	s.loadTemplates()
 	go s.cleanupSessions()