feat(db): add influx in db stack

db/.env.template

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+INFLUX_PORT=8181
+UI_PORT=8093

db/docker-compose.yml

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+services:
+  influxdb:
+    image: influxdb:3-core
+    ports:
+      - "${INFLUX_PORT}:8181"
+    entrypoint: |
+      /bin/sh -c '
+      RAW_TOKEN=$$(cat /run/secrets/admin-token) &&
+      echo "{\"name\":\"admin\",\"token\":\"$$RAW_TOKEN\"}" > /tmp/admin-token.json &&
+      exec influxdb3 serve \
+        --node-id=node0 \
+        --object-store=file \
+        --data-dir=/var/lib/influxdb3/data \
+        --admin-token-file=/tmp/admin-token.json \
+        --disable-authz=health
+      '
+    secrets:
+      - admin-token
+    volumes:
+      - influxdb3_data:/var/lib/influxdb3
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8181/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+
+  explorer:
+    image: influxdata/influxdb3-ui
+    ports:
+      - "${UI_PORT}:80"
+    environment:
+      DEFAULT_INFLUX_SERVER: "http://influxdb:${INFLUX_PORT}"
+      DEFAULT_INFLUX_DATABASE: "provence"
+      DEFAULT_SERVER_NAME: "PI-E2EEDA"
+    depends_on:
+      influxdb:
+        condition: service_healthy
+    secrets:
+      - admin-token
+    entrypoint: >
+      /bin/sh -c '
+      export DEFAULT_API_TOKEN=$$(cat /run/secrets/admin-token)'
+    restart: unless-stopped
+
+  init-influx:
+    image: influxdb:3-core
+    restart: "no"
+    depends_on:
+      influxdb:
+        condition: service_healthy
+    secrets:
+      - admin-token
+    entrypoint: |
+      /bin/sh -c '
+      influxdb3 create database \
+        --host "http://influxdb:$${INFLUX_PORT:-8181}" \
+        --token "$$(cat /run/secrets/admin-token)" \
+        provence || echo "Database provence already exists"
+      '
+
+volumes:
+  influxdb3_data:
+
+secrets:
+  admin-token:
+    file: ./secrets/admin-token.txt