add support for barometric pressure

README.md

@@ -10,7 +10,7 @@ Starter weather-station data pipeline:
    `docker compose up -d`
 
 2) Configure:
-   edit `config.yaml` (or `test.yaml`) with your MQTT broker, topic, and site coordinates.
+   edit `config.yaml` (or `test.yaml`) with your MQTT broker, topics, and site coordinates.
 
 3) Run the ingest service locally:
    `go run ./cmd/ingestd -config config.yaml`
@@ -27,8 +27,14 @@ mqtt:
   client_id: "go-weatherstation-ingestd" # Client ID
   username: ""                     # Optional username
   password: ""                     # Optional password
-  topic: "ecowitt/ws90"             # Topic to subscribe to
-  qos: 1                            # MQTT QoS (0, 1, or 2)
+  qos: 1                            # Default MQTT QoS (0, 1, or 2)
+  topics:
+    - name: "ws90"
+      topic: "ecowitt/ws90"         # WS90 payload topic
+      type: "ws90"
+    - name: "baro"
+      topic: "sensors/barometer"    # Barometric pressure topic
+      type: "baro"
 
 db:
   conn_string: "postgres://postgres:postgres@timescaledb:5432/micrometeo?sslmode=disable"
@@ -59,11 +65,13 @@ wunderground:
 ### Notes
 - The Open-Meteo ECMWF endpoint is queried by the poller only. The UI reads forecasts from TimescaleDB.
 - Web UI supports Local/UTC toggle and date-aligned ranges (6h, 24h, 72h, 7d).
+- `mqtt.topic` is still supported for single-topic configs, but `mqtt.topics` is preferred.
 
 ## Schema & tables
 TimescaleDB schema is initialized from `db/init/001_schema.sql` and includes:
 
 - `observations_ws90` (hypertable): raw WS90 observations with payload metadata, plus the full JSON payload (`payload_json`).
+- `observations_baro` (hypertable): barometric pressure observations from other MQTT topics.
 - `forecast_openmeteo_hourly` (hypertable): hourly forecast points keyed by `(site, model, retrieved_at, ts)`.
 - Continuous aggregates:
   - `cagg_ws90_1m`: 1‑minute rollups (avg/min/max for temp, humidity, wind, uvi, light, rain).
@@ -71,6 +79,7 @@ TimescaleDB schema is initialized from `db/init/001_schema.sql` and includes:
 
 Retention/compression:
 - `observations_ws90` has a 90‑day retention policy and compression after 7 days.
+- `observations_baro` has a 90‑day retention policy and compression after 7 days.
 
 ## Publish a test WS90 payload
 ```sh