feat: cut over to WASM backend

tests/plugins/uce_wasm_kill.py

@@ -0,0 +1,26 @@
+import os
+
+
+def register(registry):
+	# W4/W5 kill pages are only meaningful with the wasm backend enabled. Native
+	# requests may terminate the worker by design, so keep them out of the normal
+	# native suite unless the W5 harness opts in explicitly.
+	if os.environ.get("UCE_INCLUDE_WASM_KILL") != "1":
+		return
+
+	pages = [
+		("wasm kill loop", "/tests/wasm-kill/loop.uce", "interrupt"),
+		("wasm kill recurse", "/tests/wasm-kill/recurse.uce", "wasm_kill_recurse"),
+	]
+	for name, path, marker in pages:
+		def make_case(page_path=path, expected_marker=marker):
+			def run(context):
+				response = context.expect_status(page_path, 500)
+				context.expect_body_contains(response, "wasm runtime error during request")
+				context.expect_body_contains(response, expected_marker)
+				# The worker should remain healthy after the trap.
+				health = context.expect_status("/demo/hello.uce", 200)
+				context.expect_body_contains(health, "hello world")
+				return "clean wasm trap page and post-trap health check for %s" % page_path
+			return run
+		registry.case(name, make_case(), tags=["http", "uce", "wasm", "kill", "internal"])