LangChain: Add missing provisioning notes using init.sql

Author: amotl

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

@@ -137,6 +137,11 @@ easily move to a different cluster tier or scale horizontally.
 
 ### MCP
 
+# Provision database.
+```bash
+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/

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

@@ -9,6 +9,9 @@
 # Start database.
 docker run --rm -it --publish=4200:4200 crate/crate:nightly
 
+# Provision database.
+crash < init.sql
+
 # Start MCP server.
 export CRATEDB_MCP_TRANSPORT=streamable-http
 export CRATEDB_MCP_HOST=0.0.0.0