fix(bedrock): improve AWS credential handling and add model definitions

- Change error to warning when AWS credentials are missing in environment
- Allow fallback to system configuration (aws config files or instance profiles)
- Remove hardcoded region and profile parameters in Bedrock client
- Add Claude 3.7 Sonnet and DeepSeek R1 model definitions for Bedrock
- Update config manager to properly handle Bedrock provider

scripts/modules/config-manager.js

@@ -496,7 +496,10 @@ function getParametersForRole(role, explicitRoot = null) {
  */
 function isApiKeySet(providerName, session = null, projectRoot = null) {
 	// Define the expected environment variable name for each provider
-	if (providerName?.toLowerCase() === 'ollama') {
+
+	const okKeys = ['ollama', 'bedrock'];
+
+	if (okKeys.includes(providerName?.toLowerCase())) {
 		return true; // Indicate key status is effectively "OK"
 	}