fix: telegraf containers names + openremote pg image + session snapshot 2026-05-25

- telegraf.conf: fix Mosquitto/BunkerM container names (hyphens not underscores)
- tegraf.conf: comment out BunkerM consumer (auth fails, simulator not sending)
- openremote/docker-compose.yml: switch PG image to timescaledb-ha:pg15 (fixes timescaledb_toolkit crash)
- Add session_resume + architecture snapshot 2026-05-25
- Update TODO.md with current status

snapshots/2026-05-25/ARCHITECTURE.md

@@ -0,0 +1,49 @@
+# Smart City Digital Twin — Architecture État Actuel (snapshot)
+
+> **Date**: 2026-05-25 ~18:45 UTC
+> **Total containers**: 117
+
+## 📡 Pipeline Données (IOT → Stockage → Visualisation)
+
+```
+┌──────────────┐     MQTT topics:     ┌──────────┐     ┌───────────┐     ┌────────────┐
+│  Simulator   │──── smartcity/●/● ──▶│  EMQX    │────▶│ Telegraf  ────▶│  InfluxDB  │
+│  (60 sensors)│     "                  │ (v5.0)   │     │ (mqtt_    │     │  (v2.7)    │
+│              │──── smartcity/●/● ──▶│          │     │  consumer)│     │            │
+│ ENABLE_BUNKER│     "                  │          │     │  influxdb │────▶│ bucket:    │
+│ =0 (off)     │                      │          │     │  _v2)     │     │ "smartcity"│
+└──────────────┘                      └──────────┘     └───────────┘     └─────┬──────┘
+                                                                              │
+    Mosquitto (chirpstack) ◀── allow_anonymous=true ── config mosquitto.conf  │
+       (no data visible in logs yet)                                           │
+                                                                              ▼
+                                                                       ┌────────────┐
+                                                                       │  Grafana   │
+                                                                       │ Dashboard  │
+                                                                       │ Smart City │
+                                                                       └────────────┘
+```
+
+## 🏗️ Stacks actives (principales)
+
+| Stack | Containers | État | Réseau |
+|-------|-----------|------|--------|
+| **OpenRemote** | postgresql (timescaledb-ha), keycloak, manager | PG: starting, KC: healthy, Manager: starting | smartcity-shared + openremote_default |
+| **Smart City Core** | simulator, telegraf, grafana, influxdb, prometheus | UP | smartcity-shared |
+| **FIWARE GIS** | orion-ld, orionproxy | healthy | smartcity-shared |
+| **ChirpStack** | chirpstack, mosquitto, postgres, redis | UP | dédié + smartcity-shared |
+| **Ditto** | gateway, policies, mongodb | UP/restarting | dédié |
+| **Contexus** | app (unhealthy), postgres (healthy), redis (healthy) | mixed | smartcity-shared |
+| **Mainflux** | 15+ microservices, mqtt, jaeger (exited) | mixed | dédié |
+| **Stellio** | api-gateway (UP), search+subscription+kafka+postgres (exited) | broken | dédié |
+| **Traefik** | traefik:v3.1 | UP | traefik-public |
+
+## ⚠️ Points connus
+
+- **OpenRemote** : crash loop corrigé (image PG changée), à redémarrer
+- **Telegraf** : fixé (noms containers + BunkerM désactivé)
+- **Stellio** : cassé (kafka + postgres exited) — NGSI-LD lowest priority
+- **Contexus** : app unhealthy
+- **Pulsar/Redpanda** : arrêtés (stabilité CPU)
+- **BunkerM** : unhealthy, port 1900 (port MQTT originel)
+- **Simulator** : MQTT OK 1/2 — un seul broker sur deux (Mosquitto?)