Index S3 File

Index a single file from S3 bucket into a database. Uses the same Step Function workflow as /index-s3 but targets a specific file. Headers: - Authorization: Bearer {api_key} - Captain API key for authentication - X-Organization-ID: Organization UUID Args: database_name: Name of the database (looked up automatically) bucket_name: S3 bucket name containing the file file_uri: S3 URI of the file (format: s3://bucket-name/path/to/file.pdf) aws_access_key_id: AWS access key for S3 bucket aws_secret_access_key: AWS secret key for S3 bucket bucket_region: S3 bucket region Authentication: Requires valid API key in Authorization header