ci(chapel): include src/rust/dispatch.rs in path filter

dispatch.rs now carries the L2 Wave 1 ChapelParallelSearch wiring
(d01a33b), so changes to it can affect the Chapel parallel path.
Adding it to the chapel-ci.yml path filter means future dispatch.rs
edits trigger the Chapel accelerator workflow (Chapel build + Zig FFI
+ Rust --features chapel tests) rather than relying on collateral
workflows to catch regressions in that path.

Also: pushes that touch Cargo.toml already re-trigger Chapel CI, so
this closes the last structural hole for the now-wired dispatch
→ ChapelParallelSearch → Zig FFI → Chapel pipeline.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.github/workflows/chapel-ci.yml

@@ -6,13 +6,15 @@ on:
     paths:
       - 'src/zig_ffi/**'
       - 'src/rust/proof_search.rs'
+      - 'src/rust/dispatch.rs'
       - 'chapel_poc/**'
       - 'Cargo.toml'
       - '.github/workflows/chapel-ci.yml'
   pull_request:
     paths:
       - 'src/zig_ffi/**'
       - 'src/rust/proof_search.rs'
+      - 'src/rust/dispatch.rs'
       - 'chapel_poc/**'
       - 'Cargo.toml'
       - '.github/workflows/chapel-ci.yml'