fix(stealth): synchronize TLS and JS fingerprints to Chrome 145

Upgraded wreq to 6.0.0-rc.29 and wreq-util to 3.0.0-rc.12 to apply the latest Chrome 145 TLS fingerprint (16 cipher suites, proper extension order, ALPS, GREASE).
 Introduced __obscura_stealth global to isolate stealth-specific JS behaviors from the standard execution path.
 Overrode navigator.userAgentData and getHighEntropyValues() in stealth mode to perfectly match the sec-ch-ua network headers.
 Restricted hardwareConcurrency and deviceMemory pools in stealth mode to desktop-realistic values (e.g., minimum 4 cores, 4GB RAM) to eliminate mobile-tier leaks.
 Fixed usedJSHeapSize occasionally exceeding totalJSHeapSize.

crates/obscura-js/src/runtime.rs

@@ -130,7 +130,7 @@ impl ObscuraJsRuntime {
         runtime
             .execute_script(
                 "<obscura:init>",
-                "globalThis.__obscura_objects = {}; globalThis.__obscura_oid = 0; globalThis.__obscura_init();".to_string(),
+                "globalThis.__obscura_objects = {}; globalThis.__obscura_oid = 0;".to_string(),
             )
             .expect("init should not fail");
 
@@ -220,6 +220,22 @@ impl ObscuraJsRuntime {
         );
     }
 
+    pub fn set_stealth(&mut self, enabled: bool) {
+        let _ = self.runtime.execute_script(
+            "<set-stealth>",
+            format!("globalThis.__obscura_stealth = {};", enabled),
+        );
+    }
+
+    /// Run __obscura_init() after all per-page properties (UA, platform, stealth, etc.)
+    /// have been set. Must be called once per page setup, after all set_* methods.
+    pub fn run_page_init(&mut self) {
+        let _ = self.runtime.execute_script(
+            "<obscura:page-init>",
+            "globalThis.__obscura_init();".to_string(),
+        );
+    }
+
     /// Override the coordinates the navigator.geolocation shim reports. The
     /// values are injected as numeric globals the bootstrap reads; when unset it
     /// keeps the built-in default. Callers validate the range before calling.