fix(effect): Add SEMANTIC_ATTRIBUTE_SENTRY_OP to span attributes

Set SEMANTIC_ATTRIBUTE_SENTRY_OP explicitly in span attributes when calling
startInactiveSpan to follow codebase convention and satisfy review rules.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: cursoragent

packages/effect/src/tracer.ts

@@ -2,6 +2,7 @@ import type { Span } from '@sentry/core';
 import {
   getActiveSpan,
   getIsolationScope,
+  SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   startInactiveSpan,
   withActiveSpan,
@@ -168,12 +169,15 @@ function createSentrySpan(
 
   const spanName = deriveSpanName(name, kind);
 
+  const op = deriveOp(name, kind);
+
   const newSpan = startInactiveSpan({
     name: spanName,
-    op: deriveOp(name, kind),
+    op,
     startTime: nanosToHrTime(startTime),
     attributes: {
       [SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN]: deriveOrigin(name),
+      [SEMANTIC_ATTRIBUTE_SENTRY_OP]: op,
     },
     ...(parentSentrySpan ? { parentSpan: parentSentrySpan } : {}),
   });