LangChain: Use designated transport label http for MCP Server

That was called `streamable-http` before.

Author: amotl

topic/machine-learning/llm-langchain/README.md

@@ -145,7 +145,7 @@ crash < init.sql
 Spin up the [CrateDB MCP server], connecting it to CrateDB on localhost.
 ```bash
 export CRATEDB_CLUSTER_URL=http://crate:crate@localhost:4200/
-export CRATEDB_MCP_TRANSPORT=streamable-http
+export CRATEDB_MCP_TRANSPORT=http
 uvx cratedb-mcp serve
 ```
 

topic/machine-learning/llm-langchain/agent_with_mcp.py

@@ -13,7 +13,7 @@
 crash < init.sql
 
 # Start MCP server.
-export CRATEDB_MCP_TRANSPORT=streamable-http
+export CRATEDB_MCP_TRANSPORT=http
 export CRATEDB_MCP_HOST=0.0.0.0
 export CRATEDB_MCP_PORT=8000
 export CRATEDB_CLUSTER_URL=http://crate:crate@localhost:4200/
@@ -33,7 +33,7 @@ async def amain():
     client = MultiServerMCPClient(
         {
             "cratedb": {
-                "transport": "streamable_http",
+                "transport": "http",
                 "url": "http://localhost:8000/mcp/"
             },
         }