ci: use wasm32v1-none instead of SKIP_WASM_BUILD for doc tests

Doc tests in pezsc-basic-authorship require a real WASM runtime binary.
SKIP_WASM_BUILD=1 produces a dummy blob causing runtime panics.

Use wasm32v1-none target for test-doc (needs real WASM),
keep SKIP_WASM_BUILD=1 only for build-rustdoc (docs generation only).

.github/workflows/docs.yml

@@ -28,13 +28,15 @@ jobs:
       volumes:
         - /cache/cargo-target/pezkuwi-sdk-docs:/cache/target
     env:
-      SKIP_WASM_BUILD: 1
       RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
       CARGO_INCREMENTAL: 0
       CARGO_TARGET_DIR: /cache/target
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
+      - name: Install wasm32v1-none target
+        run: rustup target add wasm32v1-none
+
       # Clean stale caches from other workflows that ran on this VPS runner.
       # Each VPS has limited disk; leftover caches from tests/checks can fill it.
       - name: Clean stale caches