fix output annotation

src/NATSBridge.jl

@@ -388,7 +388,7 @@ Each payload can have a different type, enabling mixed-content messages (e.g., c
    - `sender_id::String = string(uuid4())` - Sender ID (auto-generated UUID if not provided)
 
 # Return:
-  - A tuple `(env, env_json_str)` where:
+  - `::Tuple{msg_envelope_v1, String}` - A tuple containing:
     - `env::msg_envelope_v1` - The envelope object containing all metadata and payloads
     - `env_json_str::String` - JSON string representation of the envelope for publishing
 
@@ -447,7 +447,7 @@ function smartsend(
   NATS_connection::Union{NATS.Connection, Nothing} = nothing,  # a provided connection saves establishing connection overhead.
   msg_id::String = string(uuid4()),  # Message ID
   sender_id::String = string(uuid4())  # Sender ID
-) where {T1<:Any}
+)::Tuple{msg_envelope_v1, String} where {T1<:Any}
 
   # Log start of send operation
   log_trace(correlation_id, "Starting smartsend for subject: $subject")
@@ -754,14 +754,14 @@ A HTTP file server is required along with its download function.
   - `max_delay::Int = 5000` - Maximum delay for exponential backoff in ms
 
 # Return:
-   - JSON object of envelope with list of (dataname, data, data_type) tuples in payloads field
+   - `::JSON.Object{String, Any}` - key-value structure resemble msg_envelope_v1
 
 # Example
 ```jldoctest
 # Receive and process message
 msg = nats_message  # NATS message
-payloads = smartreceive(msg; fileserver_download_handler=_fetch_with_backoff, max_retries=5, base_delay=100, max_delay=5000)
-# payloads = [("dataname1", data1, "type1"), ("dataname2", data2, "type2"), ...]
+env = smartreceive(msg; fileserver_download_handler=_fetch_with_backoff, max_retries=5, base_delay=100, max_delay=5000)
+# env["payloads"] = [("dataname1", data1, "type1"), ("dataname2", data2, "type2"), ...]
 ```
 """
 function smartreceive(
@@ -770,7 +770,7 @@ function smartreceive(
   max_retries::Int = 5,
   base_delay::Int = 100,
   max_delay::Int = 5000
-)
+)::JSON.Object{String, Any}
   # Parse the JSON envelope
   env_json_obj = JSON.parse(String(msg.payload))
   log_trace(env_json_obj["correlation_id"], "Processing received message")  # Log message processing start
@@ -818,7 +818,7 @@ function smartreceive(
     end
   end
   env_json_obj["payloads"] = payloads_list
-  return env_json_obj  # JSON object of envelope with list of (dataname, data, data_type) tuples in payloads field
+  return env_json_obj  # key-value structure resemble msg_envelope_v1
 end