docs: Clarify exception_id and parent_id parameters in

   exceptions_from_error

Add docstring details distinguishing mechanism.exception_id (sequential
   counter) from Python id() values used for cycle detection, and
   explaining parent_id's role in the event payload.

Author: ericapisani

sentry_sdk/utils.py

@@ -828,6 +828,22 @@ def exceptions_from_error(
 
     See the Exception Interface documentation for more details:
     https://develop.sentry.dev/sdk/event-payloads/exception/
+
+    Args:
+        exception_id (int):
+
+            Sequential counter for assigning ``mechanism.exception_id``
+            to each processed exception. Is NOT the result of calling `id()` on the exception itself.
+
+        parent_id (int):
+
+            The ``mechanism.exception_id`` of the parent exception.
+
+            Written into ``mechanism.parent_id`` in the event payload so Sentry can
+            reconstruct the exception tree.
+
+            Not to be confused with ``seen_exception_ids``, which tracks Python ``id()``
+            values for cycle detection.
     """
 
     if seen_exception_ids is None: