fix fastapi otl import checker

Author: lesnik512

lite_bootstrap/bootstrappers/fastapi_bootstrapper.py

@@ -25,9 +25,11 @@
     from fastapi.routing import _merge_lifespan_context
 
 if import_checker.is_opentelemetry_installed:
-    from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
     from opentelemetry.trace import get_tracer_provider
 
+if import_checker.is_fastapi_opentelemetry_installed:
+    from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
+
 if import_checker.is_prometheus_fastapi_instrumentator_installed:
     from prometheus_fastapi_instrumentator import Instrumentator
 

lite_bootstrap/import_checker.py

@@ -9,3 +9,4 @@
 is_litestar_installed = find_spec("litestar") is not None
 is_faststream_installed = find_spec("faststream") is not None
 is_prometheus_fastapi_instrumentator_installed = find_spec("prometheus_fastapi_instrumentator") is not None
+is_fastapi_opentelemetry_installed = find_spec("opentelemetry.instrumentation.fastapi") is not None