fix(lsp): wrap initialization config in initializationOptions field

The LSP `initialize` request expects custom server options in the
`initializationOptions` field, but the code was spreading
`this.server.initialization` directly into the root params object.
This caused LSP servers that depend on `initializationOptions`
(like ets-language-server, pyright, etc.) to not receive their
configuration.

Closes #2665

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

src/tools/lsp/lsp-client-connection.ts

@@ -55,7 +55,7 @@ export class LSPClientConnection extends LSPClientTransport {
           },
         },
       },
-      ...this.server.initialization,
+      initializationOptions: this.server.initialization,
     })
     this.sendNotification("initialized")
     this.sendNotification("workspace/didChangeConfiguration", {