docs: added open telemetry description

Author: raphael-goetz

docs/dev.md

@@ -102,6 +102,11 @@ Defaults are defined in `crates/taurus/src/config/mod.rs`.
 | `RUNTIME_STATUS_UPDATE_INTERVAL_SECONDS` | Heartbeat interval in dynamic mode (`0` disables heartbeat) | `30` |
 | `AQUILA_GRPC_CONNECT_TIMEOUT_SECS` | Timeout in seconds for establishing Aquila gRPC channels | `2` |
 | `AQUILA_GRPC_REQUEST_TIMEOUT_SECS` | Timeout in seconds for Aquila gRPC requests | `10` |
+| `OPENTELEMETRY_ENABLED` | Enables OpenTelemetry export when an endpoint is configured | `false` |
+| `OPENTELEMETRY_SERVICE_NAME` | Service name used for exported telemetry | `taurus` |
+| `OPENTELEMETRY_LOGS_ENDPOINT` | OTLP logs endpoint | empty |
+| `OPENTELEMETRY_METRICS_ENDPOINT` | OTLP metrics endpoint | empty |
+| `OPENTELEMETRY_TRACES_ENDPOINT` | OTLP traces endpoint | empty |
 
 ## Local Development
 

docs/installation.mdx

@@ -90,6 +90,11 @@ Taurus configuration is split into shared variables and mode-specific variables.
 | `GRPC_HOST`           | Hostname for the Taurus gRPC server.                                                                         | `127.0.0.1`                     |
 | `GRPC_PORT`           | Port for the Taurus gRPC server.                                                                             | `50051`                          |
 | `WITH_HEALTH_SERVICE` | Enables the gRPC health service when set to `true`.                                                          | `false`                         |
+| `OPENTELEMETRY_ENABLED` | Enables OpenTelemetry logs, traces, and metrics export when an endpoint is configured.                     | `false`                         |
+| `OPENTELEMETRY_SERVICE_NAME` | Service name used for exported telemetry.                                                           | `taurus`                        |
+| `OPENTELEMETRY_LOGS_ENDPOINT` | OTLP logs endpoint. Empty disables log export.                                                     |                                  |
+| `OPENTELEMETRY_METRICS_ENDPOINT` | OTLP metrics endpoint. Empty disables metric export.                                           |                                  |
+| `OPENTELEMETRY_TRACES_ENDPOINT` | OTLP traces endpoint. Empty disables trace export.                                               |                                  |
 
 ### Dynamic Mode