build(coding-agent): prevented embedding native runtime dependencies

- Standardized `fastembed` and `onnxruntime-node` as external dependencies for all compiled binaries.
- Removed manual exclusion logic from individual build scripts in favor of a centralized configuration.
- Updated release build dry-run output to reflect consistent external dependency handling.

Fixes #5195

packages/coding-agent/scripts/compile-binary.ts

@@ -1,6 +1,9 @@
 import { buildDocsIndexPayload } from "./generate-docs-index";
 import { createLegacyPiVirtualModulePlugin } from "./legacy-pi-virtual-module";
 
+/** Native runtime dependencies always resolved from the on-demand install instead of embedded into compiled binaries. */
+export const COMPILED_EXTERNAL_DEPENDENCIES: readonly string[] = Object.freeze(["fastembed", "onnxruntime-node"]);
+
 /** Inputs shared by local and release coding-agent binary builds. */
 export interface CodingAgentCompileOptions {
 	/** Absolute repository root used for package resolution. */
@@ -13,8 +16,6 @@ export interface CodingAgentCompileOptions {
 	readonly transformersVersion: string;
 	/** Optional cross-compilation runtime target. */
 	readonly target?: Bun.Build.CompileTarget;
-	/** Dependencies intentionally resolved from the runtime filesystem. */
-	readonly external?: readonly string[];
 	/** Match release builds that minify identifiers while retaining names. */
 	readonly minifyIdentifiers?: boolean;
 	/** Disable Bun's built-in Darwin signing before the caller re-signs. */
@@ -34,7 +35,7 @@ export async function compileCodingAgent(options: CodingAgentCompileOptions): Pr
 		const output = await Bun.build({
 			entrypoints: [options.entrypoint],
 			root: options.repoRoot,
-			external: options.external ? [...options.external] : undefined,
+			external: [...COMPILED_EXTERNAL_DEPENDENCIES],
 			define: {
 				"process.env.PI_COMPILED": JSON.stringify("true"),
 				"process.env.PI_TINY_TRANSFORMERS_VERSION": JSON.stringify(options.transformersVersion),