v3.5.4 — Robust attack chaining & false-positive reduction

Bundles the multi-round post-exploitation attack-chaining engine (attack_chain:
per-foothold decisions, loot carried forward, validate-before-pivot, loop-until-
dry, --chain-depth) and the false-positive controls (robust verdict parsing,
severity-aware quorum, adversarial refute pass, stronger validator prompt).
Version bumped 3.5.3 -> 3.5.4; README/RELEASE updated.

TUTORIAL.md

@@ -1,4 +1,4 @@
-# NeuroSploit — Tutorial & User Guide (v3.5.3)
+# NeuroSploit — Tutorial & User Guide (v3.5.4)
 
 A complete, hands-on guide to installing, configuring and running NeuroSploit —
 the autonomous, multi-model penetration-testing harness.
@@ -98,7 +98,7 @@ Agents **degrade gracefully**: if `rustscan` is absent they use `nmap`; if neith
 ### Verify
 
 ```bash
-neurosploit --version          # neurosploit 3.5.3
+neurosploit --version          # neurosploit 3.5.4
 neurosploit agents             # {"vulns":196,...,"chains":12,"total":329}
 neurosploit models             # all providers & models
 ```