refactor: isolate deno_core into windmill-runtime-nativets subcrate (#7848)

* refactor: isolate deno_core into windmill-runtime-nativets subcrate

Remove deno_core from flow eval and isolate nativets V8 runtime into a
dedicated subcrate so deno_core compilation no longer blocks
windmill-worker or windmill-api.

- Create windmill-jseval crate: QuickJS-based JS eval for flow
  expressions and batch rerun, extracted from windmill-worker
- Create windmill-runtime-nativets crate: all deno_core/V8 deps and
  nativets script execution, with build.rs snapshot generation
- Simplify windmill-worker: remove all deno_* direct deps, empty
  build.rs, gate nativets behind optional dep
- Update windmill-api: use windmill-jseval for batch rerun instead of
  deno_core, remove deno_core feature entirely
- Add nativets integration tests (nativets_jobs.rs) and parallel
  stress test (nativets_stress.rs, 8 workers x 200 jobs)
- Remove dead code: deno flow eval path, USE_QUICKJS env var,
  parity tests (replaced with 63 standalone expected-value tests)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: address PR review feedback for deno_core isolation

- Deduplicate unsafe_raw() into windmill-common/src/utils.rs (single source)
- Delete orphaned runtime.js and windmill-client.js from windmill-worker/src/
- Fix operator precedence in windmill-jseval with explicit parentheses
- Remove unnecessary return keyword in heap limit callback
- Remove redundant as usize casts
- Remove ~150 lines of commented-out code from runtime.js
- Remove commented-out #[cfg] in build.rs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* otel ee

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

backend/windmill-runtime-nativets/src/runtime.js

@@ -0,0 +1,62 @@
+import * as abortSignal from "ext:deno_web/03_abort_signal.js";
+import * as base64 from "ext:deno_web/05_base64.js";
+import * as console from "ext:deno_console/01_console.js";
+import * as encoding from "ext:deno_web/08_text_encoding.js";
+import * as event from "ext:deno_web/02_event.js";
+import * as fetch from "ext:deno_fetch/26_fetch.js";
+import * as file from "ext:deno_web/09_file.js";
+import * as fileReader from "ext:deno_web/10_filereader.js";
+import * as formData from "ext:deno_fetch/21_formdata.js";
+import * as headers from "ext:deno_fetch/20_headers.js";
+import * as streams from "ext:deno_web/06_streams.js";
+import * as timers from "ext:deno_web/02_timers.js";
+import * as url from "ext:deno_url/00_url.js";
+import * as net from "ext:deno_net/01_net.js";
+import * as tls from "ext:deno_net/02_tls.js";
+import * as urlPattern from "ext:deno_url/01_urlpattern.js";
+import * as webidl from "ext:deno_webidl/00_webidl.js";
+import * as response from "ext:deno_fetch/23_response.js";
+import * as request from "ext:deno_fetch/23_request.js";
+import "ext:deno_web/02_structured_clone.js";
+import "ext:deno_web/04_global_interfaces.js";
+import "ext:deno_web/13_message_port.js";
+import "ext:deno_web/14_compression.js";
+import "ext:deno_web/15_performance.js";
+import "ext:deno_web/16_image_data.js";
+import "ext:deno_fetch/27_eventsource.js";
+
+globalThis.atob = base64.atob;
+globalThis.btoa = base64.btoa;
+globalThis.fetch = fetch.fetch;
+globalThis.Request = request.Request;
+globalThis.Response = response.Response;
+globalThis.Blob = file.Blob;
+globalThis.URL = url.URL;
+globalThis.FormData = formData.FormData;
+globalThis.URLSearchParams = url.URLSearchParams;
+globalThis.Headers = headers.Headers;
+globalThis.FileReader = fileReader.FileReader;
+globalThis.console = new console.Console((msg, level) =>
+  globalThis.Deno.core.ops.op_log(msg)
+);
+globalThis.AbortController = abortSignal.AbortController;
+globalThis.AbortSignal = abortSignal.AbortSignal;
+
+Object.assign(globalThis, {
+  clearInterval: timers.clearInterval,
+  clearTimeout: timers.clearTimeout,
+  setInterval: timers.setInterval,
+  setTimeout: timers.setTimeout,
+});
+
+// Expose bootstrapOtel globally so it can be called from Rust after runtime creation.
+// We use dynamic import so deno_telemetry isn't loaded during snapshot creation.
+// Config: [tracingEnabled, metricsEnabled, consoleConfig, deterministic]
+// consoleConfig: 0=ignore, 1=capture, 2=replace
+globalThis.__bootstrapOtel = () => {
+  import("ext:deno_telemetry/telemetry.ts").then(({ bootstrap, enterSpan }) => {
+    bootstrap([1, 0, 1, 0]);
+    // Expose enterSpan for setting parent trace context
+    globalThis.__enterSpan = enterSpan;
+  });
+};