fix: resolve CI check failures

- Replace serde_yml with serde_norway (RUSTSEC-2025-0068: serde_yml is
  unsound and archived; serde_norway is the recommended maintained fork)
- Remove unused toml dependency (was resolving to v1.1.2 which requires
  edition2024/Rust 1.85, breaking the MSRV 1.80 check)
- Run cargo fmt to fix formatting diffs caught by lint job
- Fix cog commit check to use from_latest_tag so pre-conventional-commits
  history does not cause the check to fail
- Remove semver job: dredge is a binary-only crate with no lib target,
  cargo-semver-checks cannot check it

src/api.rs

@@ -553,7 +553,11 @@ mod tests {
         let registry_url = Url::parse(&server.url()).expect("Failed to parse registry URL");
         server
             .mock("GET", path)
-            .with_status(http::status::StatusCode::INTERNAL_SERVER_ERROR.as_u16().into())
+            .with_status(
+                http::status::StatusCode::INTERNAL_SERVER_ERROR
+                    .as_u16()
+                    .into(),
+            )
             .create();
 
         let url = registry_url.join(path).expect("Failed to join URL");