fix: Mark the EXCEPTION result of an overridden flag in the all flags state

When the evaluation of an overridden flag throws during allFlagsState,
the error result now carries the marking of the flag's own definition,
so the state presents its marked reason with event tracking off, as for
any override-affected flag.

Author: kinyoklion

lib/sdk/server/src/test/java/com/launchdarkly/sdk/server/InputValidatingEvaluatorOverrideTest.java

@@ -4,6 +4,7 @@
 import com.launchdarkly.sdk.EvaluationReason.ErrorKind;
 import com.launchdarkly.sdk.LDValue;
 import com.launchdarkly.sdk.LDValueType;
+import com.launchdarkly.sdk.json.JsonSerialization;
 import com.launchdarkly.sdk.server.DataModel.FeatureFlag;
 import com.launchdarkly.sdk.server.subsystems.DataStoreTypes.DataKind;
 import com.launchdarkly.sdk.server.subsystems.DataStoreTypes.ItemDescriptor;
@@ -154,6 +155,24 @@ public void errorResultOfOverrideFlagKeepsMarkingWithCallerDefault() {
     assertEquals(EvaluationReason.error(ErrorKind.MALFORMED_FLAG).withOverrideAffected(true), result.getResult().getReason());
   }
 
+  @Test
+  public void allFlagsStateMarksTheExceptionResultOfAnOverrideFlagAndTurnsOffItsTracking() {
+    FeatureFlag marked = flagWithPrerequisite("marked").markedAsOverride();
+    FeatureFlag plain = flagWithPrerequisite("plain");
+    FeatureFlagsState state = evaluatorOver(storeFailingOn("prereq", marked, plain))
+        .allFlagsState(BASE_USER, FlagsStateOption.WITH_REASONS);
+    LDValue flagsState = LDValue.parse(JsonSerialization.serialize(state)).get("$flagsState");
+
+    assertEquals(EvaluationReason.ErrorKind.EXCEPTION, state.getFlagReason("marked").getErrorKind());
+    assertTrue(state.getFlagReason("marked").isOverrideAffected());
+    assertTrue(flagsState.get("marked").get("trackEvents").isNull());
+
+    // A flag that did not come from the override store keeps its unmarked reason and tracking.
+    assertEquals(EvaluationReason.ErrorKind.EXCEPTION, state.getFlagReason("plain").getErrorKind());
+    assertFalse(state.getFlagReason("plain").isOverrideAffected());
+    assertEquals(LDValue.of(true), flagsState.get("plain").get("trackEvents"));
+  }
+
   @Test
   public void allFlagsStateKeepsMarkedReason() {
     FeatureFlag marked = flagBuilder("marked").on(false).offVariation(0).variations(LDValue.of("x")).build()