fix(web): handle unhandled promise rejections in tool_used captureEvent calls

Add .catch(() => {}) to all fire-and-forget captureEvent('tool_used')
calls in adapters.ts and server.ts, matching the existing pattern in
apiHandler.ts. Prevents unhandled promise rejections if telemetry fails.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: msukkari

packages/web/src/features/mcp/server.ts

@@ -62,7 +62,7 @@ export async function createMcpServer(): Promise<McpServer> {
                 toolName: 'list_language_models',
                 source: 'sourcebot-mcp-server',
                 success: true,
-            });
+            }).catch(() => {});
             return { content: [{ type: "text", text: JSON.stringify(models) }] };
         }
     );
@@ -111,7 +111,7 @@ export async function createMcpServer(): Promise<McpServer> {
                         toolName: 'ask_codebase',
                         source: 'sourcebot-mcp-server',
                         success: false,
-                    });
+                    }).catch(() => {});
                     return {
                         content: [{ type: "text", text: `Failed to ask codebase: ${result.message}` }],
                     };
@@ -121,7 +121,7 @@ export async function createMcpServer(): Promise<McpServer> {
                     toolName: 'ask_codebase',
                     source: 'sourcebot-mcp-server',
                     success: true,
-                });
+                }).catch(() => {});
 
                 const formattedResponse = dedent`
                 ${result.answer}

packages/web/src/features/tools/adapters.ts

@@ -24,7 +24,7 @@ export function toVercelAITool<TName extends string, TShape extends z.ZodRawShap
                     toolName: def.name,
                     source: context.source ?? 'unknown',
                     success,
-                });
+                }).catch(() => {});
             }
         },
         toModelOutput: ({ output }) => ({