fix(ci): restore docs and release workflows

Summary

• Fixes the docs deploy failure by running the repository’s deploy script, so CI uses the Wrangler version pinned by the docs package instead of installing a mismatched action version.
• Repairs release graph cross builds by collecting Cargo metadata for both target and host platforms, so host build scripts and proc macros keep the correct dependencies and features.
• Keeps release packaging on the source-built once binary in CI, which makes the workflow exercise the prelude from this branch, and adds retries around Cargo vendor and metadata calls to absorb transient registry fetch failures.
• The final approach keeps the generic Rust graph model intact instead of special-casing failing crates, with focused prelude tests for the host metadata cases reproduced from main.

Testing

• git diff --check
• bash -n mise/tasks/release/prepare-rust-graph-deps.sh
• mise exec -- cargo fmt --all -- --check
• mise exec -- cargo test -p once-frontend --test prelude
• mise exec -- aube run build
• mise/tasks/release/prepare-rust-graph-deps.sh --target x86_64-unknown-linux-gnu
• mise exec -- cargo build --locked --release --package once-cli
• target/release/once build crates/once/once_staticlib_x86_64_apple_darwin --format json --quiet

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