PY-194 Improve the error message in NeptuneRetryError (#11)

* PY-194 Improve the error message in NeptuneRetryError

Improve the error message to tell what the SOFT and HARD timeouts are set to (against the time spent on the request) and how to bump them.

* Update src/neptune_query/exceptions.py

Co-authored-by: Sabine Ståhlberg <sabine.stahlberg@neptune.ai>

---------

Co-authored-by: Sabine Ståhlberg <sabine.stahlberg@neptune.ai>

Author: gabrys

src/neptune_query/exceptions.py

@@ -206,13 +206,25 @@ def __init__(
             """
 {h1}NeptuneRetryError: The Neptune server returned an error after {retries} retries, {time:.2f} seconds.{end}
 
+The retry logic handles rate limiting and network errors. To adjust the timeouts for retrying server requests,
+change the values of the following environment variables, which are currently set to:
+
+NEPTUNE_QUERY_RETRY_SOFT_TIMEOUT={soft_limit}
+NEPTUNE_QUERY_RETRY_HARD_TIMEOUT={hard_limit}
+
+For details, see the docs:
+https://docs.neptune.ai/environment_variables/neptune_query#neptune_query_retry_soft_timeout
+https://docs.neptune.ai/environment_variables/neptune_query#neptune_query_retry_hard_timeout
+
 {status_code_line}
 {content_line}
 """,
             retries=retries,
             time=time,
             status_code_line=f"Last response status: {last_status_code}" if last_status_code is not None else "",
             content_line=f"Last response content: {content_str}" if last_content is not None else "",
+            soft_limit=env.NEPTUNE_QUERY_RETRY_SOFT_TIMEOUT.get(),
+            hard_limit=env.NEPTUNE_QUERY_RETRY_HARD_TIMEOUT.get(),
         )
 
 
@@ -301,7 +313,7 @@ def warn_unsupported_value_type(type_: str) -> None:
     _warned_types.add(type_)
     warnings.warn(
         f"A value of type `{type_}` was returned by your query. This type is not supported by your installed version "
-        "of neptune-fetcher. Values will evaluate to `None` and empty DataFrames. "
-        "Upgrade neptune-fetcher to access this data.",
+        "of neptune-query. Values will evaluate to `None` and empty DataFrames. "
+        "Upgrade neptune-query to access this data.",
         NeptuneWarning,
     )