feat: expand compute protocol catalog

[intel352]

Summary

• add batch, workload, sandboxed OCI, residue policy, and WASM provider-catalog protocol types
• validate schema digests and reusable residue workspace requirements
• cover batch/sandboxed OCI, malformed digest, residue, and no-workspace WASM contracts

Verification

• GOWORK=off go test ./... -v -race -count=1
• GOWORK=off go build ./...
• GOWORK=off go vet ./...
• git diff --check
• (workflow) GOWORK=off go run ./cmd/wfctl plugin validate-contract /Users/jon/workspace/workflow-plugin-compute-core