feat: add datadog support to manifest-server (#739)

Author: pedroslopez

airbyte_cdk/manifest_server/README.md

@@ -154,3 +154,25 @@ docker run -p 8080:8080 manifest-server
 ```
 
 Note: The container runs on port 8080 by default.
+
+## Datadog APM
+
+The manifest server supports Datadog APM tracing for monitoring and observability:
+
+### Configuration
+
+To enable Datadog tracing, set the environment variable:
+
+```bash
+export DD_ENABLED=true
+```
+
+This requires the `ddtrace` dependency, which is included in the `manifest-server` extra. For additional configuration options via environment variables, see [ddtrace configuration](https://ddtrace.readthedocs.io/en/stable/configuration.html).
+
+### Usage
+
+```bash
+# Run with Datadog tracing enabled
+DD_ENABLED=true manifest-server start
+```
+

airbyte_cdk/manifest_server/app.py

@@ -1,3 +1,9 @@
+import os
+
+if os.getenv("DD_ENABLED", "false").lower() == "true":
+    # Auto-instrumentation should be imported as early as possible.
+    import ddtrace.auto  # noqa: F401
+
 from fastapi import FastAPI
 
 from .routers import capabilities, health, manifest

airbyte_cdk/manifest_server/cli/_common.py

@@ -7,6 +7,7 @@
 
 # Import server dependencies with graceful fallback
 try:
+    import ddtrace  # noqa: F401
     import fastapi  # noqa: F401
     import uvicorn  # noqa: F401