reduce docs

docs/tutorial.md

@@ -33,18 +33,28 @@ smartsend(subject, [(dataname, data, type), ...], options)
 env = smartreceive(msg, options)
 ```
 
+**Important Platform Differences:**
+
+1. **Encoding field:** Julia and JavaScript preserve the original serialization format in the encoding field (`"base64"`, `"json"`, or `"arrow-ipc"`), while Python and MicroPython always use `"base64"` for all direct transport payloads.
+
+2. **Async vs Sync:** JavaScript and Python desktop use async/await, while MicroPython uses synchronous API.
+
 ### Supported Payload Types
 
 | Type | Julia | JavaScript | Python | MicroPython |
 |------|-------|------------|--------|-------------|
 | `text` | `String` | `string` | `str` | `str` |
 | `dictionary` | `Dict` | `Object` | `dict` | `dict` |
-| `table` | `DataFrame` | `Array<Object>` | `DataFrame` | ❌ |
+| `arrowtable` | `DataFrame` | `Array<Object>` | `pandas.DataFrame` | ❌ |
+| `jsontable` | `Vector{NamedTuple}` | `Array<Object>` | `list[dict]` | ❌ |
+| `table` | ❌ | ❌ | `pandas.DataFrame` | ❌ |
 | `image` | `Vector{UInt8}` | `Uint8Array` | `bytes` | `bytearray` |
 | `audio` | `Vector{UInt8}` | `Uint8Array` | `bytes` | `bytearray` |
 | `video` | `Vector{UInt8}` | `Uint8Array` | `bytes` | `bytearray` |
 | `binary` | `Vector{UInt8}` | `Uint8Array` | `bytes` | `bytearray` |
 
+**Note on MicroPython:** MicroPython does not support table types (`arrowtable`, `jsontable`, or `table`) due to memory constraints. Use `dictionary` or `binary` instead.
+
 ---
 
 ## Prerequisites
@@ -645,7 +655,7 @@ df = DataFrame(
     score = [95, 88, 92]
 )
 
-data = [("students", df, "table")]
+data = [("students", df, "arrowtable")]
 env, env_json_str = smartsend("/data/students", data, broker_url="nats://localhost:4222")
 ```
 
@@ -661,7 +671,7 @@ const table_data = [
     { id: 3, name: "Charlie", score: 92 }
 ];
 
-const data = [["students", table_data, "table"]];
+const data = [["students", table_data, "arrowtable"]];
 const [env, env_json_str] = await NATSBridge.smartsend(
     "/data/students",
     data,
@@ -728,4 +738,4 @@ MicroPython does not support table type due to memory constraints. Use dictionar
 
 ## License
 
-MIT
+MIT