remove rheemcloud pkg, implement against rest api only

README.md

@@ -1,8 +1,7 @@
 # econet-exporter 🔥💧
 
-An exporter for **Rheem EcoNet / Rheemcloud** water-heater data. It keeps a
-long-lived connection to the Rheem cloud (via
-[`rheemcloud-go`](https://github.com/kevinburke/rheemcloud-go)) and exposes device
+An exporter for **Rheem EcoNet / Rheemcloud** water-heater data. It polls the
+Rheem cloud REST API (ClearBlade backend) on an interval and exposes device
 state and usage three ways:
 
 - **OTEL metrics** served for Prometheus scraping at `/metrics` (live state +
@@ -25,7 +24,7 @@ go-app defaults. Custom fields (see `pkg/config/custom.go`):
 | `econetEmail` | `ECONET_EMAIL` | Rheem account email |
 | `econetPassword` | `ECONET_PASSWORD` | Prefer the env var; keep out of config.yaml |
 | `costPerKWH` | `ECONET_COST_PER_KWH` | **US dollars per kWh** (e.g. `0.18` = 18¢), not cents |
-| `usageInterval` | `ECONET_USAGE_INTERVAL` | Energy/water poll interval (default `5m`) |
+| `pollInterval` | `ECONET_POLL_INTERVAL` | How often device state + daily energy/water usage are re-fetched over REST (default `1m`) |
 
 Everything under the go-app `AppConfig` (logging, otel, http, grpc) is also
 env-overridable with `APP_*` variables — see `env-sample`.
@@ -47,20 +46,27 @@ Then:
 
 Per-device gauges labeled `econet.serial`, `econet.device_id`,
 `econet.friendly_name`: `econet_setpoint_fahrenheit`, `econet_connected`,
-`econet_running`, `econet_enabled`, `econet_away`,
-`econet_hot_water_availability_percent`, `econet_alert_count`,
-`econet_wifi_signal_db`, `econet_device_info` (adds `type`/`generic_type`/`mode`).
+`econet_running` (adds a `running_state` label naming the active stage, e.g.
+`compressor-running` / `element-running` / `idle`), `econet_enabled`,
+`econet_away`, `econet_hot_water_availability_percent`, `econet_alert_count`,
+`econet_wifi_signal_db`, `econet_mode` (enum: `1` for the current mode, `0`
+otherwise, via a `mode` label), `econet_device_info` (adds
+`type`/`generic_type`/`mode`).
 Polled usage: `econet_energy_usage_kwh`, `econet_water_usage_gallons`,
 `econet_energy_cost_dollars`.
 
+> Note: `econet_wifi_signal_db` is only delivered over Rheem's MQTT push stream,
+> which this exporter does not use — it stays at `0`.
+
 ## 📂 Project Structure
 - `proto/econet/v1alpha1/` - Protobuf definitions (source).
 - `api/econet/v1alpha1/` - Generated proto, grpc, grpc-gateway code.
 - `pkg/config/` - Custom config merged with go-app configuration.
-- `pkg/econet/` - `EconetService` (owns the rheemcloud client) plus:
+- `pkg/econet/` - `EconetService` (owns the REST client + poll ticker) plus:
+  - `econetclient/` - minimal EcoNet REST client (auth, devices, usage).
   - `econetgrpc/` - gRPC `EconetService` implementation.
   - `econetmcp/` - MCP server + tools.
-  - `econetmetrics/` - OTEL observable gauges + usage poller.
+  - `econetmetrics/` - OTEL observable gauges.
 - `helm/` - Helm chart for Kubernetes deployment.
 - `.gitea/workflows/` - CI pipelines.