feat: replace async crypto with sync Rust WASM (port of Baileys b5c1741)

Surgically applies the changes from WhiskeySockets/Baileys commit b5c1741
("feat: replace async crypto with sync Rust WASM" by jlucaso1) while
preserving all custom modifications (interactive messages, carousels,
albums, sticker packs, native flow buttons, Prometheus metrics, etc).

Changes:
- Replace async hkdf/md5 (Web Crypto API) with sync re-exports from whatsapp-rust-bridge@0.5.2
- Replace LTHash class with LTHashAntiTampering from WASM
- Replace mutationKeys() with expandAppStateKeys() from WASM
- Remove ~25 unnecessary await keywords across crypto call chain
- Update Buffer→Uint8Array types for MediaDecryptionKeyInfo and internal crypto functions
- Make noise handshake, media retry encrypt/decrypt, and reporting token generation synchronous

Performance impact:
- Eliminates Promise overhead on every HKDF/LTHash operation
- Significant improvement during app state sync (hundreds of mutations per reconnection)
- Sync crypto reduces event loop pressure under high session load

Custom code preserved (zero conflicts):
- messages-send.ts: All interactive message, carousel, album, sticker pack logic intact
- Types/Message.ts: All custom types (NativeFlowButton, Carousel, Album, etc.) intact
- All Prometheus metrics, circuit breakers, session TTL logic intact

https://claude.ai/code/session_01Ffc5YrPuqv8N9SwEuSM8mr

package-lock.json

@@ -21,6 +21,7 @@
         "pino": "^9.6",
         "prom-client": "^15.1.3",
         "protobufjs": "^7.2.4",
+        "whatsapp-rust-bridge": "0.5.2",
         "ws": "^8.13.0"
       },
       "devDependencies": {
@@ -14568,6 +14569,12 @@
       "dev": true,
       "license": "BSD-2-Clause"
     },
+    "node_modules/whatsapp-rust-bridge": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/whatsapp-rust-bridge/-/whatsapp-rust-bridge-0.5.2.tgz",
+      "integrity": "sha512-6KBRNvxg6WMIwZ/euA8qVzj16qxMBzLllfmaJIP1JGAAfSvwn6nr8JDOMXeqpXPEOl71UfOG+79JwKEoT2b1Fw==",
+      "license": "MIT"
+    },
     "node_modules/whatwg-url": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",