Speed up inbound WebSocket validation (#1895)

* perf(protocol): generate inbound ws validators

* perf(client): use generated ws validation

* docs(protocol): document generated validation

* fix(protocol): make validator generation source-only

* test(protocol): cover explicit provider model normalization

* fix(protocol): preserve inbound compat defaults

* fix(protocol): make validator import rewrite portable

* fix(protocol): harden validation safety checks

* fix(protocol): guard generated validator boundaries

* fix(protocol): normalize legacy inbound defaults

* fix(protocol): simplify generated validation safety net

* fix(protocol): keep cold typecheck source-only

* fix(protocol): encapsulate validator codegen

* fix(protocol): bootstrap source-alias typechecks

* fix(app): keep source aliases out of bundler config

* fix(protocol): harden validator codegen packaging

* fix(protocol): own zod-aot patches in generator

* fix(protocol): trim validator safety net

* fix(client): normalize provider updates before dispatch

* fix(protocol): keep validator generation out of install

packages/protocol/src/validation/ws-outbound-schema-metadata.ts

@@ -0,0 +1,3 @@
+import { WSOutboundMessageSchema as SourceWSOutboundMessageSchema } from "../messages.js";
+
+export const WSOutboundMessageSchema = { schema: SourceWSOutboundMessageSchema };

packages/protocol/src/validation/ws-outbound.ts

@@ -0,0 +1,19 @@
+import type { z } from "zod";
+import { WSOutboundMessageSchema } from "../generated/validation/ws-outbound.aot.js";
+import type { WSOutboundMessage } from "../messages.js";
+
+type WSOutboundValidationResult =
+  | { success: true; data: WSOutboundMessage }
+  | { success: false; error: z.ZodError };
+
+interface WSOutboundGeneratedValidator {
+  safeParse(input: unknown): WSOutboundValidationResult;
+}
+
+// zod-aot emits runtime JavaScript from WSOutboundMessageSchema but not its TypeScript surface.
+// Protocol regression tests cover the patched compiler cases behind this boundary.
+const wsOutboundValidator = WSOutboundMessageSchema as WSOutboundGeneratedValidator;
+
+export function validateWSOutboundMessage(input: unknown): WSOutboundValidationResult {
+  return wsOutboundValidator.safeParse(input);
+}