Fix "indented block" linter error (#3468)

* fix: Fix mypy "indented block" error

Fix this [mypy error](https://github.com/getsentry/sentry-python/actions/runs/10390581522/job/28771379618):

```
sentry_sdk/integrations/opentelemetry/potel_span_processor.py:149: error: expected an indented block after function definition on line 31  [syntax]
```

Honestly not sure why this change fixes the problem, maybe there is some bug in `mypy`.

* fix: Fix other mypy syntax failures

After fixing the previous mypy failure, mypy discovered more syntax problems, which this commit fixes.

* fix: Correct typing in `potel_span_processor`

Fixing the original mypy error broke the typing; this change fixes the typing.

Author: szokeasaurusrex

sentry_sdk/integrations/opentelemetry/potel_span_processor.py

@@ -1,4 +1,5 @@
 from collections import deque, defaultdict
+from typing import cast
 
 from opentelemetry.trace import format_trace_id, format_span_id
 from opentelemetry.context import Context
@@ -145,7 +146,7 @@ def _root_span_to_transaction_event(self, span):
                 "transaction_info": {"source": "custom"},
                 "contexts": contexts,
             }
-        )  # type: Event
+        )
 
         return event
 
@@ -154,7 +155,10 @@ def _span_to_json(self, span):
         if not span.context:
             return None
 
-        span_json = self._common_span_transaction_attributes_as_json(span)
+        # This is a safe cast because dict[str, Any] is a superset of Event
+        span_json = cast(
+            "dict[str, Any]", self._common_span_transaction_attributes_as_json(span)
+        )
         if span_json is None:
             return None
 
@@ -184,14 +188,14 @@ def _span_to_json(self, span):
         return span_json
 
     def _common_span_transaction_attributes_as_json(self, span):
-        # type: (ReadableSpan) -> Optional[dict[str, Any]]
+        # type: (ReadableSpan) -> Optional[Event]
         if not span.start_time or not span.end_time:
             return None
 
         common_json = {
             "start_timestamp": convert_from_otel_timestamp(span.start_time),
             "timestamp": convert_from_otel_timestamp(span.end_time),
-        }  # type: dict[str, Any]
+        }  # type: Event
 
         measurements = extract_span_attributes(span, SentrySpanAttribute.MEASUREMENT)
         if measurements:

sentry_sdk/integrations/opentelemetry/scope.py

@@ -43,10 +43,10 @@ def _get_current_scope(cls):
 
     @classmethod
     def get_isolation_scope(cls):
+        # type: () -> Scope
         """
         Returns the isolation scope.
         """
-        # type: () -> Scope
         return cls._get_isolation_scope() or _INITIAL_ISOLATION_SCOPE
 
     @classmethod

sentry_sdk/scope.py

@@ -770,8 +770,8 @@ def span(self):
 
     @span.setter
     def span(self, span):
-        """Set current tracing span."""
         # type: (Optional[Span]) -> None
+        """Set current tracing span."""
         self._span = span
         # XXX: this differs from the implementation in JS, there Scope.setSpan
         # does not set Scope._transactionName.

sentry_sdk/tracing.py

@@ -1364,7 +1364,7 @@ def sampled(self):
 
     @sampled.setter
     def sampled(self, value):
-        # type: () -> Optional[bool]
+        # type: (Optional[bool]) -> None
         pass
 
     @property