chore: add #![forbid(unsafe_code)] to safe Rust crates

Adds the forbid(unsafe_code) crate-level attribute to all Rust crates
that do not use unsafe code, hardening the safety guarantee at compile
time.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

crates/claude-client/src/lib.rs

@@ -10,6 +10,7 @@
 //! - Hybrid local/cloud inference
 //! - Rate limiting and retry logic
 
+#![forbid(unsafe_code)]
 use futures::StreamExt;
 use reqwest::Client;
 use serde::{Deserialize, Serialize};

crates/lsm/src/lib.rs

@@ -5,6 +5,7 @@
 //! This serves as the first reservoir in our neurosymbolic pipeline,
 //! processing temporal sensor data with spike-timing dynamics.
 
+#![forbid(unsafe_code)]
 use ndarray::{Array1, Array2, Array3, Axis};
 use ndarray_rand::RandomExt;
 use rand::distributions::{Bernoulli, Uniform};

crates/neurophone-core/src/lib.rs

@@ -12,6 +12,7 @@
 //! 3. **Bridge**: Encodes neural firing patterns into textual context for the LLM.
 //! 4. **LLM**: Local Llama 3.2 for reasoning, with Claude 3.5 fallback.
 
+#![forbid(unsafe_code)]
 use ndarray::Array1;
 use serde::{Deserialize, Serialize};
 use std::sync::Arc;