docs: python: add compatibility matrix (#124)

Author: xrmx

docs/_edot-sdks/python/index.md

@@ -4,7 +4,7 @@ layout: default
 nav_order: 6
 ---
 
-## EDOT Python
+# EDOT Python
 
 The [Elastic Distribution of OpenTelemetry Python (EDOT Python)](https://github.com/elastic/elastic-otel-python) is a customized version of [OpenTelemetry Python](https://opentelemetry.io/docs/languages/python).
 EDOT Python makes it easier to get started using OpenTelemetry in your Python applications through strictly OpenTelemetry native means, while also providing a smooth and rich out of the box experience with [Elastic Observability](https://www.elastic.co/observability). It's an explicit goal of this distribution **to avoid introducing proprietary concepts** in addition to those defined by the wider OpenTelemetry community. For any additional features introduced we aim for contributing them back to the upstream OpenTelemetry Python project.
@@ -17,3 +17,18 @@ With EDOT Python you have access to all the features of the OpenTelemetry Python
 * Preconfigured collection of tracing and metrics signals, applying some opinionated defaults, such as which sources are collected by default.
 
 **Ready to try out EDOT Python?** Follow the step-by-step instructions in [Setup](./setup/index).
+
+## Compatibility matrix
+
+Data can be exported in the OpenTelemetry-native [OTLP (OpenTelemetry protocol)](https://opentelemetry.io/docs/specs/otlp) format via gRPC (default)
+and HTTP to self-managed, Elastic Cloud Hosted or Elastic Cloud Serverless observability backends.
+
+For the best (and supported) experience, we recommend exporting data from EDOT Python via the [EDOT Collector](https://elastic.github.io/opentelemetry/edot-collector/index).
+
+| EDOT Python | Elastic Stack 8.x | Elastic Stack 9.x | Serverless |
+| ----------- | ----------------- | ----------------- | ---------- |
+| 1.0.0       | 8.18.0+¹          | 9.0.0+¹           | ✅ ²       |
+
+***1.** Via the EDOT Collector.*
+
+***2.** Via the OTel-native ingest endpoint.*