fix: Add provider name attribute to beforeEvaluationInternal

Restored SEMCONV_FEATURE_FLAG_PROVIDER_NAME attribute in beforeEvaluationInternal
that was accidentally removed. The provider name should be included in both
the span attributes (beforeEvaluationInternal) and event attributes (afterEvaluation).

Addresses PR feedback from tanderson-ld and kinyoklion.

Co-Authored-By: rlamb@launchdarkly.com <rlamb@launchdarkly.com>

Author: devin-ai-integration[bot]

lib/java-server-sdk-otel/src/main/java/com/launchdarkly/integrations/TracingHook.java

@@ -61,6 +61,7 @@ Map<String, Object> beforeEvaluationInternal(Tracer tracer, EvaluationSeriesCont
 
     AttributesBuilder attrBuilder = Attributes.builder();
     attrBuilder.put(SEMCONV_FEATURE_FLAG_KEY, seriesContext.flagKey);
+    attrBuilder.put(SEMCONV_FEATURE_FLAG_PROVIDER_NAME, PROVIDER_NAME);
     attrBuilder.put(SEMCONV_FEATURE_FLAG_CONTEXT_ID, seriesContext.context.getFullyQualifiedKey());
     builder.setAllAttributes(attrBuilder.build());
     Span span = builder.startSpan();