Add ExecuteCode notebook MCP and pin protoc-gen-go-mcp (#1095)

## Summary
- add a new `ExecuteCode` RPC to the notebooks tool proto and regenerate
tool artifacts
- expose the new tool through Codex notebook MCP wiring
- pin `protoc-gen-go-mcp` in `buf.gen.yaml` to
`v0.0.0-20260323112146-887f275039cd`
- adapt generated runtime tool values to `mcp-go` tool values in the
Codex notebook MCP bridge

## Why
- `protoc-gen-go-mcp` output now returns runtime tool types that are not
directly accepted by `mcp-go` server registration
- pinning the generator makes output stable/reproducible
- the adapter keeps runme compatible with the current generator output
without post-generation rewrite hacks

## Validation
- `go test ./pkg/agent/codex`
- `go test ./pkg/agent/ai/tools`

## Related to

runmedev/web#154

---------

Signed-off-by: Jeremy lewi <jeremy@lewi.us>

Author: jlewi

api/gen/proto/es/agent/tools/v1/notebooks_pb.d.ts

@@ -3,103 +3,60 @@
 /* eslint-disable */
 
 import { enumDesc, fileDesc, messageDesc, serviceDesc, tsEnum } from "@bufbuild/protobuf/codegenv2";
-import { file_runme_parser_v1_parser } from "../../../runme/parser/v1/parser_pb";
 
 /**
  * Describes the file agent/tools/v1/notebooks.proto.
  */
 export const file_agent_tools_v1_notebooks = /*@__PURE__*/
-  fileDesc("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", [file_runme_parser_v1_parser]);
+  fileDesc("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");
 
 /**
- * Describes the message agent.tools.v1.ListCellsRequest.
- * Use `create(ListCellsRequestSchema)` to create a new message.
+ * Describes the message agent.tools.v1.ExecuteCodeRequest.
+ * Use `create(ExecuteCodeRequestSchema)` to create a new message.
  */
-export const ListCellsRequestSchema = /*@__PURE__*/
+export const ExecuteCodeRequestSchema = /*@__PURE__*/
   messageDesc(file_agent_tools_v1_notebooks, 0);
 
 /**
- * Describes the message agent.tools.v1.ListCellsResponse.
- * Use `create(ListCellsResponseSchema)` to create a new message.
+ * Describes the message agent.tools.v1.ExecuteCodeResponse.
+ * Use `create(ExecuteCodeResponseSchema)` to create a new message.
  */
-export const ListCellsResponseSchema = /*@__PURE__*/
+export const ExecuteCodeResponseSchema = /*@__PURE__*/
   messageDesc(file_agent_tools_v1_notebooks, 1);
 
-/**
- * Describes the message agent.tools.v1.GetCellsRequest.
- * Use `create(GetCellsRequestSchema)` to create a new message.
- */
-export const GetCellsRequestSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 2);
-
-/**
- * Describes the message agent.tools.v1.GetCellsResponse.
- * Use `create(GetCellsResponseSchema)` to create a new message.
- */
-export const GetCellsResponseSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 3);
-
-/**
- * Describes the message agent.tools.v1.UpdateCellsRequest.
- * Use `create(UpdateCellsRequestSchema)` to create a new message.
- */
-export const UpdateCellsRequestSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 4);
-
-/**
- * Describes the message agent.tools.v1.UpdateCellsResponse.
- * Use `create(UpdateCellsResponseSchema)` to create a new message.
- */
-export const UpdateCellsResponseSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 5);
-
-/**
- * Describes the message agent.tools.v1.NotebookServiceExecuteCellsRequest.
- * Use `create(NotebookServiceExecuteCellsRequestSchema)` to create a new message.
- */
-export const NotebookServiceExecuteCellsRequestSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 6);
-
-/**
- * Describes the message agent.tools.v1.NotebookServiceExecuteCellsResponse.
- * Use `create(NotebookServiceExecuteCellsResponseSchema)` to create a new message.
- */
-export const NotebookServiceExecuteCellsResponseSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 7);
-
 /**
  * Describes the message agent.tools.v1.TerminateRunRequest.
  * Use `create(TerminateRunRequestSchema)` to create a new message.
  */
 export const TerminateRunRequestSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 8);
+  messageDesc(file_agent_tools_v1_notebooks, 2);
 
 /**
  * Describes the message agent.tools.v1.TerminateRunResponse.
  * Use `create(TerminateRunResponseSchema)` to create a new message.
  */
 export const TerminateRunResponseSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 9);
+  messageDesc(file_agent_tools_v1_notebooks, 3);
 
 /**
  * Describes the message agent.tools.v1.ToolCallInput.
  * Use `create(ToolCallInputSchema)` to create a new message.
  */
 export const ToolCallInputSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 10);
+  messageDesc(file_agent_tools_v1_notebooks, 4);
 
 /**
  * Describes the message agent.tools.v1.ToolCallOutput.
  * Use `create(ToolCallOutputSchema)` to create a new message.
  */
 export const ToolCallOutputSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 11);
+  messageDesc(file_agent_tools_v1_notebooks, 5);
 
 /**
  * Describes the enum agent.tools.v1.ToolCallOutput.Status.
  */
 export const ToolCallOutput_StatusSchema = /*@__PURE__*/
-  enumDesc(file_agent_tools_v1_notebooks, 11, 0);
+  enumDesc(file_agent_tools_v1_notebooks, 5, 0);
 
 /**
  * @generated from enum agent.tools.v1.ToolCallOutput.Status
@@ -112,21 +69,21 @@ export const ToolCallOutput_Status = /*@__PURE__*/
  * Use `create(ChatkitStateSchema)` to create a new message.
  */
 export const ChatkitStateSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 12);
+  messageDesc(file_agent_tools_v1_notebooks, 6);
 
 /**
  * Describes the message agent.tools.v1.SendSlackMessageRequest.
  * Use `create(SendSlackMessageRequestSchema)` to create a new message.
  */
 export const SendSlackMessageRequestSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 13);
+  messageDesc(file_agent_tools_v1_notebooks, 7);
 
 /**
  * Describes the message agent.tools.v1.SendSlackMessageResponse.
  * Use `create(SendSlackMessageResponseSchema)` to create a new message.
  */
 export const SendSlackMessageResponseSchema = /*@__PURE__*/
-  messageDesc(file_agent_tools_v1_notebooks, 14);
+  messageDesc(file_agent_tools_v1_notebooks, 8);
 
 /**
  * NotebookService defines methods the AI can use to interact with the notebook.
@@ -137,9 +94,6 @@ export const SendSlackMessageResponseSchema = /*@__PURE__*/
  *
  * It looks like only comments on the method get translated into the description.
  *
- * TODO(jlewi): We should make it UpdateCells to allow the model to update multiple cells in a
- * single call.
- *
  * @generated from service agent.tools.v1.NotebookService
  */
 export const NotebookService = /*@__PURE__*/