feat: add pprof profiling controlled by ENABLE_PPROF env var

Add net/http/pprof support to both Go server (default port 6060) and
ingestor (default port 6061). Profiling is off by default — only
starts the pprof HTTP listener when ENABLE_PPROF=true.

PPROF_PORT env var overrides the default port for each binary.

Enable on staging-go in docker-compose with exposed ports 6060/6061.
Not enabled on prod.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

cmd/ingestor/main.go

@@ -8,6 +8,9 @@ import (
 	"flag"
 	"fmt"
 	"log"
+	"math"
+	"net/http"
+	_ "net/http/pprof"
 	"os"
 	"os/signal"
 	"path/filepath"
@@ -19,6 +22,18 @@ import (
 )
 
 func main() {
+	// pprof profiling — off by default, enable with ENABLE_PPROF=true
+	if os.Getenv("ENABLE_PPROF") == "true" {
+		pprofPort := os.Getenv("PPROF_PORT")
+		if pprofPort == "" {
+			pprofPort = "6061"
+		}
+		go func() {
+			log.Printf("[pprof] ingestor profiling at http://localhost:%s/debug/pprof/", pprofPort)
+			log.Fatal(http.ListenAndServe(":"+pprofPort, nil))
+		}()
+	}
+
 	configPath := flag.String("config", "config.json", "path to config file")
 	flag.Parse()
 
@@ -193,7 +208,8 @@ func handleMessage(store *Store, tag string, source MQTTSource, m mqtt.Message,
 		observerID := parts[2]
 		name, _ := msg["origin"].(string)
 		iata := parts[1]
-		if err := store.UpsertObserver(observerID, name, iata); err != nil {
+		meta := extractObserverMeta(msg)
+		if err := store.UpsertObserver(observerID, name, iata, meta); err != nil {
 			log.Printf("MQTT [%s] observer status error: %v", tag, err)
 		}
 		log.Printf("MQTT [%s] status: %s (%s)", tag, firstNonEmpty(name, observerID), iata)
@@ -260,7 +276,7 @@ func handleMessage(store *Store, tag string, source MQTTSource, m mqtt.Message,
 		// Upsert observer
 		if observerID != "" {
 			origin, _ := msg["origin"].(string)
-			if err := store.UpsertObserver(observerID, origin, region); err != nil {
+			if err := store.UpsertObserver(observerID, origin, region, nil); err != nil {
 				log.Printf("MQTT [%s] observer upsert error: %v", tag, err)
 			}
 		}
@@ -446,6 +462,39 @@ func toFloat64(v interface{}) (float64, bool) {
 	}
 }
 
+// extractObserverMeta extracts hardware metadata from an MQTT status message.
+// Casts battery_mv and uptime_secs to integers (they're always whole numbers).
+func extractObserverMeta(msg map[string]interface{}) *ObserverMeta {
+	meta := &ObserverMeta{}
+	hasData := false
+
+	if v, ok := msg["battery_mv"]; ok {
+		if f, ok := toFloat64(v); ok {
+			iv := int(math.Round(f))
+			meta.BatteryMv = &iv
+			hasData = true
+		}
+	}
+	if v, ok := msg["uptime_secs"]; ok {
+		if f, ok := toFloat64(v); ok {
+			iv := int64(math.Round(f))
+			meta.UptimeSecs = &iv
+			hasData = true
+		}
+	}
+	if v, ok := msg["noise_floor"]; ok {
+		if f, ok := toFloat64(v); ok {
+			meta.NoiseFloor = &f
+			hasData = true
+		}
+	}
+
+	if !hasData {
+		return nil
+	}
+	return meta
+}
+
 func firstNonEmpty(vals ...string) string {
 	for _, v := range vals {
 		if v != "" {

cmd/server/main.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	_ "net/http/pprof"
 	"os"
 	"os/exec"
 	"os/signal"
@@ -54,6 +55,18 @@ func resolveBuildTime() string {
 }
 
 func main() {
+	// pprof profiling — off by default, enable with ENABLE_PPROF=true
+	if os.Getenv("ENABLE_PPROF") == "true" {
+		pprofPort := os.Getenv("PPROF_PORT")
+		if pprofPort == "" {
+			pprofPort = "6060"
+		}
+		go func() {
+			log.Printf("[pprof] profiling UI at http://localhost:%s/debug/pprof/", pprofPort)
+			log.Fatal(http.ListenAndServe(":"+pprofPort, nil))
+		}()
+	}
+
 	var (
 		configDir  string
 		port       int

docker-compose.yml

@@ -58,12 +58,16 @@ services:
     ports:
       - "${STAGING_GO_HTTP_PORT:-82}:80"
       - "${STAGING_GO_MQTT_PORT:-1885}:1883"
+      - "6060:6060"   # pprof server
+      - "6061:6061"   # pprof ingestor
     volumes:
       - ${STAGING_DATA_DIR:-~/meshcore-staging-data}/config.json:/app/config.json:ro
       - ${STAGING_DATA_DIR:-~/meshcore-staging-data}:/app/data
       - caddy-data-staging-go:/data/caddy
     environment:
       - NODE_ENV=staging
+      - ENABLE_PPROF=true
+      - PPROF_PORT=6060
     healthcheck:
       test: ["CMD", "wget", "-qO-", "http://localhost:3000/api/stats"]
       interval: 30s