feat(idp): Add custom Bedrock endpoint support for VPC interface endpoints

[Copilot]

Summary

Enables customers to use custom Bedrock endpoints for the IDP connector to support Virtual VPC interface endpoints, as requested in the issue.

Problem

The IDP connector's BedrockRuntimeClientSupplier was not utilizing the custom endpoint configuration that was already available through AwsBaseConfiguration.endpoint. This prevented customers from using VPC interface endpoints for AWS Bedrock as described in the AWS documentation.

Solution

Modified BedrockRuntimeClientSupplier.getBedrockRuntimeClient() to check for and use custom endpoints when provided:

public BedrockRuntimeClient getBedrockRuntimeClient(final AwsProvider request) {
  var builder = BedrockRuntimeClient.builder()
      .credentialsProvider(CredentialsProviderSupportV2.credentialsProvider(request))
      .region(Region.of(request.getConfiguration().region()));

  if (request.getConfiguration().endpoint() != null && 
      !request.getConfiguration().endpoint().trim().isEmpty()) {
    builder.endpointOverride(URI.create(request.getConfiguration().endpoint()));
  }

  return builder.build();
}

Changes

• BedrockRuntimeClientSupplier: Added logic to use endpointOverride() when a custom endpoint is configured
• Tests: Added comprehensive test coverage for custom endpoints, null endpoints, and empty endpoints
• Backward compatibility: Existing behavior preserved when no custom endpoint is specified

Testing

Added test cases covering:

• ✅ Custom VPC endpoint usage (e.g., https://bedrock-runtime.vpce-12345.us-east-1.vpce.amazonaws.com)
• ✅ Null endpoint handling (uses default AWS endpoints)
• ✅ Empty/whitespace endpoint handling (uses default AWS endpoints)
• ✅ Successful BedrockRuntimeClient creation in all scenarios

Example Usage

With this change, customers can now configure VPC interface endpoints in their IDP connector configuration:

{
  "configuration": {
    "region": "us-east-1",
    "endpoint": "https://bedrock-runtime.vpce-12345.us-east-1.vpce.amazonaws.com"
  }
}

Fixes #4992.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• artifacts.camunda.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.text=ALL-UNNAMED --add-opens=java.desktop/java.awt.font=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.10/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.10/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.10 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.10/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/connectors/connectors org.codehaus.plexus.classworlds.launcher.Launcher clean compile -pl connectors/idp-extraction (dns block)
• build.shibboleth.net
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.text=ALL-UNNAMED --add-opens=java.desktop/java.awt.font=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.10/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.10/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.10 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.10/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/connectors/connectors org.codehaus.plexus.classworlds.launcher.Launcher clean compile -pl connectors/idp-extraction (dns block)
• packages.confluent.io
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.text=ALL-UNNAMED --add-opens=java.desktop/java.awt.font=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.10/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.10/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.10 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.10/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/connectors/connectors org.codehaus.plexus.classworlds.launcher.Launcher clean compile -pl connectors/idp-extraction (dns block)
• repository.sonatype.org

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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[reiballa]

lgtm, checking tests