Revert to simple cargo publish without tag-derived versioning

Version is now managed directly in Cargo.toml.

https://claude.ai/code/session_019tzejYnzWFARWNgHBZ4fhN

Author: claude

.github/workflows/publish.yml

@@ -13,16 +13,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set version from git tag
-        run: |
-          VERSION="${GITHUB_REF_NAME#v}"
-          echo "Publishing version: $VERSION"
-          sed -i "s/^version = .*/version = \"$VERSION\"/" Cargo.toml
-
       - uses: dtolnay/rust-toolchain@stable
 
       - run: cargo test
 
-      - run: cargo publish --allow-dirty
+      - run: cargo publish
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}