[REHEARSAL] scaffold: emit a program-id output block per program

[michael-moffett]

Fork-internal CI rehearsal. Not for merge, not for upstream.

Rehearses p032/scaffold-339-program-id-output (head e0de52b) against .github/workflows/ on real
runner images before the change is offered anywhere else. Base is this fork's main.

Change under test: crates/cli/src/scaffold/mod.rs, +42 / −0, one file.

Base branch note: this fork's main is 4971d40d, exactly one commit behind
solana-foundation/surfpool@de6a055. main was deliberately not fast-forwarded, because
release_crates.yaml and release_cli.yaml fire on push: branches: [main] and firing a publish
workflow to rehearse a test workflow is not a trade worth making. 4971d40d is an ancestor of de6a055,
so refs/pull/N/merge resolves to e0de52b's tree exactly and CI tests the intended bytes.

[greptile-apps]

Greptile Summary

The PR extends scaffold generation to emit a program-ID output block for every deployed program.

• Appends output blocks in both in-memory and on-disk IaC scaffolding paths.
• Adds a focused unit test covering multiple programs and output-block separation.

Confidence Score: 4/5

The PR should not be merged while the previously reported lost-update race in the airdrop helper remains outstanding.

The airdrop helper still reads a balance in one RPC request and later writes the computed absolute balance in another, so a concurrent balance mutation can be overwritten.

Files Needing Attention: crates/sdk-node/surfpool-sdk/kit/surfpool.ts

Important Files Changed

Filename	Overview
crates/cli/src/scaffold/mod.rs	Adds a shared program-ID output template, integrates it into both scaffold paths, and tests multi-program rendering.

_{Reviews (2): Last reviewed commit: "test(scaffold): assert the program-outpu..." | Re-trigger Greptile}

[michael-moffett]

Superseded: base was rehearsal-base-339, and no workflow in this tree triggers on a PR into a branch by that name (rust.yml is pull_request: branches: ["main"]), so the only check that could ever appear here was the Greptile app. Reopening against main.