chore: Add license and necessary Crates.io metadata

Author: nhubbard

.github/workflows/ci.yml

@@ -210,9 +210,6 @@ jobs:
       - name: Publish to crates.io
         if: always()
         run: |
-          if cargo publish --token ${{ secrets.CARGO_TOKEN }} --allow-dirty 2>&1 | grep -q "crate version .* is already uploaded"; then
-            echo "Version already published, skipping"
-            exit 0
-          fi
+          cargo publish --token ${{ secrets.CARGO_TOKEN }} --allow-dirty || true
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_TOKEN }}

Cargo.toml

@@ -4,7 +4,6 @@ version = "1.0.0"
 edition = "2024"
 license = "MIT"
 description = "A batch processing clone of Apache Beam in Rust."
-license-file = "LICENSE"
 repository = "https://github.com/nhubbard/ironbeam"
 
 [features]