Report bazel as provider in telemetry for payload-in-files mode

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/ci/BazelInfo.java

@@ -0,0 +1,36 @@
+package datadog.trace.civisibility.ci;
+
+import datadog.trace.api.civisibility.telemetry.tag.Provider;
+import datadog.trace.api.git.GitInfo;
+import javax.annotation.Nonnull;
+
+/**
+ * Provider strategy used when Bazel payload-in-files mode is active. The orchestrating Bazel rule
+ * is responsible for collecting CI/git information and enriching the test spans downstream (e.g.
+ * combining with the underlying CI provider to produce {@code bazel/github}). This strategy only
+ * surfaces {@link Provider#BAZEL} for telemetry so the rule can confirm that the agent detected the
+ * mode; no environment or git data is read here.
+ */
+class BazelInfo implements CIProviderInfo {
+
+  @Override
+  public GitInfo buildCIGitInfo() {
+    return GitInfo.NOOP;
+  }
+
+  @Override
+  public CIInfo buildCIInfo() {
+    return CIInfo.NOOP;
+  }
+
+  @Nonnull
+  @Override
+  public PullRequestInfo buildPullRequestInfo() {
+    return PullRequestInfo.EMPTY;
+  }
+
+  @Override
+  public Provider getProvider() {
+    return Provider.BAZEL;
+  }
+}

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/ci/CIProviderInfoFactory.java

@@ -1,6 +1,7 @@
 package datadog.trace.civisibility.ci;
 
 import datadog.trace.api.Config;
+import datadog.trace.api.civisibility.config.BazelMode;
 import datadog.trace.civisibility.ci.env.CiEnvironment;
 import java.nio.file.Path;
 
@@ -21,6 +22,12 @@ public CIProviderInfoFactory(Config config, CiEnvironment environment) {
   }
 
   public CIProviderInfo createCIProviderInfo(Path currentPath) {
+    // bazel rule supplies CI/git data downstream
+    BazelMode bazelMode = BazelMode.get();
+    if (bazelMode.isPayloadFilesEnabled() && bazelMode.getPayloadsDir() != null) {
+      return new BazelInfo();
+    }
+
     if (!config.isCiVisibilityCiProviderIntegrationEnabled()) {
       return new UnknownCIInfo(environment, targetFolder, currentPath);
     }

internal-api/src/main/java/datadog/trace/api/civisibility/telemetry/tag/Provider.java

@@ -7,6 +7,7 @@ public enum Provider implements TagValue {
   APPVEYOR,
   AWS,
   AZP,
+  BAZEL,
   BITBUCKET,
   BITRISE,
   BUILDKITE,