fix: logging, prediction update, multiple bugs (#584)

* Fix logging configuration issues that made logging stop operation. Switch to Loguru
  logging (from Python logging). Enable console and file logging with different log levels.
  Add logging documentation.

* Fix logging configuration and EOS configuration out of sync. Added tracking support
  for nested value updates of Pydantic models. This used to update the logging configuration
  when the EOS configurationm for logging is changed. Should keep logging config and EOS
  config in sync as long as all changes to the EOS logging configuration are done by
  set_nested_value(), which is the case for the REST API.

* Fix energy management task looping endlessly after the second update when trying to update
  the last_update datetime.

* Fix get_nested_value() to correctly take values from the dicts in a Pydantic model instance.

* Fix usage of model classes instead of model instances in nested value access when evaluation
  the value type that is associated to each key.

* Fix illegal json format in prediction documentation for PVForecastAkkudoktor provider.

* Fix documentation qirks and add EOS Connect to integrations.

* Support deprecated fields in configuration in documentation generation and EOSdash.

* Enhance EOSdash demo to show BrightSky humidity data (that is often missing)

* Update documentation reference to German EOS installation videos.

Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>

docs/_generated/openapi.md

@@ -464,6 +464,55 @@ Health check endpoint to verify that the EOS server is alive.
 
 ---
 
+## GET /v1/logging/log
+
+**Links**: [local](http://localhost:8503/docs#/default/fastapi_logging_get_log_v1_logging_log_get), [eos](https://petstore3.swagger.io/?url=https://raw.githubusercontent.com/Akkudoktor-EOS/EOS/refs/heads/main/openapi.json#/default/fastapi_logging_get_log_v1_logging_log_get)
+
+Fastapi Logging Get Log
+
+```
+Get structured log entries from the EOS log file.
+
+Filters and returns log entries based on the specified query parameters. The log
+file is expected to contain newline-delimited JSON entries.
+
+Args:
+    limit (int): Maximum number of entries to return.
+    level (Optional[str]): Filter logs by severity level (e.g., DEBUG, INFO).
+    contains (Optional[str]): Return only logs that include this string in the message.
+    regex (Optional[str]): Return logs that match this regular expression in the message.
+    from_time (Optional[str]): ISO 8601 timestamp to filter logs not older than this.
+    to_time (Optional[str]): ISO 8601 timestamp to filter logs not newer than this.
+    tail (bool): If True, fetch the most recent log entries (like `tail`).
+
+Returns:
+    JSONResponse: A JSON list of log entries.
+```
+
+**Parameters**:
+
+- `limit` (query, optional): Maximum number of log entries to return.
+
+- `level` (query, optional): Filter by log level (e.g., INFO, ERROR).
+
+- `contains` (query, optional): Filter logs containing this substring.
+
+- `regex` (query, optional): Filter logs by matching regex in message.
+
+- `from_time` (query, optional): Start time (ISO format) for filtering logs.
+
+- `to_time` (query, optional): End time (ISO format) for filtering logs.
+
+- `tail` (query, optional): If True, returns the most recent lines (tail mode).
+
+**Responses**:
+
+- **200**: Successful Response
+
+- **422**: Validation Error
+
+---
+
 ## PUT /v1/measurement/data
 
 **Links**: [local](http://localhost:8503/docs#/default/fastapi_measurement_data_put_v1_measurement_data_put), [eos](https://petstore3.swagger.io/?url=https://raw.githubusercontent.com/Akkudoktor-EOS/EOS/refs/heads/main/openapi.json#/default/fastapi_measurement_data_put_v1_measurement_data_put)