test(sol): SIMD-525 devnet verification scripts

[bhavidhingra]

What

Verification scripts for CHALO-1077 (Solana 200ms slot / SIMD-525) analysis.

Scripts

• simd525-hot-wallet-presign.ts — Hot wallet presign rebuild test. Prebuilds tx (captures blockhash B1), waits 120s, signs (triggers presignTransaction rebuild → fresh blockhash B2), verifies B1≠B2, broadcasts successfully. Proves hot wallets are NOT affected by SIMD-525.

• simd525-durable-nonce-check.ts — Custodial/cold wallet durable nonce verification. Prebuilds tx, deserializes txHex, finds AdvanceNonceAccount instruction (System program, ix index 4), extracts nonceAccount + nonceAuthority. Proves custodial/cold wallets use durable nonce → bypass blockhash expiry.

• simd525-recovery-warning.ts — Recovery warning test for PR feat(sol): warn when recovery is called without durable nonce (SIMD-525) #9372. Calls recover() with and without durableNonce, captures console.warn to verify warning fires only when durableNonce is missing.

Test Results

• Hot wallet (120s hold): B1≠B2 ✅, broadcast succeeded ✅
• Custodial wallet: AdvanceNonceAccount ix found ✅, nonce account + authority extracted ✅
• Recovery warning: ready to run on fix branch

References: CSHLD-000