M2: use fixed-size pixel chunks in oracle decoder (#2342)

Keep RGBA decoding unchanged while satisfying the current Clippy lint.
Include the separately verified Rustls 0.23.46 lock prerequisite.

Co-authored-by: sanyamsingh001 <314051937+sanyamsingh001@users.noreply.github.com>
Co-authored-by: Codex <codex@openai.com>

Cargo.lock

@@ -5411,9 +5411,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.45"
+version = "0.23.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d41d731c7d2f962d1ccc364cec258de3c0e93b38c2fb3ba97ac74513048d634"
+checksum = "48e13bd8c0e9365c43cfa5c9e8f9ad49d3c8444926c9aac819e0e4dc503c8fdf"
 dependencies = [
  "aws-lc-rs",
  "log",

crates/oracle/src/pixels.rs

@@ -186,7 +186,7 @@ pub fn decode_pam_gray(bytes: &[u8]) -> Option<(usize, usize, Vec<u8>)> {
         return None;
     }
     let mut out = Vec::with_capacity(width.checked_mul(height)?);
-    for px in data.get(..wanted)?.chunks_exact(4) {
+    for px in data.get(..wanted)?.as_chunks::<4>().0 {
         let (&r, &g, &b, &a) = (px.first()?, px.get(1)?, px.get(2)?, px.get(3)?);
         // Composite premultiplied RGB over white, in integer arithmetic that cannot overflow:
         // each term is at most 255, and the sum is at most 255.