update opentelemetry.mdc to mention otlp-spring module

Author: adinauer

.cursor/rules/opentelemetry.mdc

@@ -15,6 +15,7 @@ The Sentry Java SDK provides comprehensive OpenTelemetry integration through mul
 - `sentry-opentelemetry-bootstrap`: Classes that go into the bootstrap classloader when the agent is used. For agentless they are simply used in the applications classloader.
 - `sentry-opentelemetry-agentcustomization`: Classes that help wire up Sentry in OpenTelemetry. These land in the agent classloader when the agent is used. For agentless they are simply used in the application classloader.
 - `sentry-opentelemetry-otlp`: Classes for using OpenTelemetry to send spans to Sentry using the OTLP endpoint and have Sentry use OpenTelemetry trace and span id.
+- `sentry-opentelemetry-otlp-spring`: Spring Boot convenience module that includes `sentry-opentelemetry-otlp` and the OpenTelemetry Spring Boot starter as transitive dependencies.
 
 ## Advantages over using Sentry without OpenTelemetry
 
@@ -92,4 +93,5 @@ To debug forking of `Scopes`, we added a reference to `parent` `Scopes` and a `c
 When using `sentry-opentelemetry-otlp`, Sentry only loads trace ID and span ID from OpenTelemetry `Context` (via `OpenTelemetryOtlpEventProcessor`). Sentry does not rely on OpenTelemetry `Context` for scope storage and propagation, instead relying on its `DefaultScopesStorage`.
 It is common to keep Performance in Sentry SDK disabled since that part is taken over by OpenTelemetry.
 The `sentry-opentelemetry-otlp` module is not connected to the other `sentry-opentelemetry-*` modules but instead intended only when the goal is to run OpenTelemetry for creating spans and Sentry for other products like errors, logs, metrics etc.
+The `sentry-opentelemetry-otlp-spring` module wraps `sentry-opentelemetry-otlp` and includes the OpenTelemetry Spring Boot starter for easier setup in Spring Boot applications.
 The OTLP module does not easily work with the OpenTelemetry agent as it would require customizing the agent.JAR in order to get the propagator loaded.