test(toolkit): add welcome contract e2e

[whankinsiv]

Overview

Migrates the welcome example dapp from midnight-contracts as outlined in this plan: https://docs.google.com/spreadsheets/d/1i3cuQpV6ik3kV4tbRZdspK-5unikogaewDCS2gR6I9g/edit?gid=0#gid=0

🗹 TODO before merging

• Ready

📌 Submission Checklist

• All commits are signed off (git commit -s) for the DCO
• Changes are backward-compatible (or flagged if breaking)
• Pull request description explains why the change is needed
• Self-reviewed the diff
• I have included a change file, or skipped for this reason:
• If the changes introduce a new feature, I have bumped the node minor version
• Update documentation (if relevant)
• Updated AGENTS.md if build commands, architecture, or workflows changed
• No new todos introduced

🧪 Testing Evidence

NODE_IMAGE=midnightntwrk/midnight-node:2.0.0-rc.4 COMPACT_HOME="$PWD/.compact-home" COMPACTC_VERSION=0.33.0-rc.1 TOOLKIT_JS_PATH="$PWD/util/toolkit-js" cargo test --test toolkit_e2e welcome_e2e

running 1 test
test welcome_e2e has been running for over 60 seconds
test welcome_e2e ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 6 filtered out; finished in 89.03s

🔱 Fork Strategy

• Node Runtime Update
• Node Client Update
• Other:
• N/A

Links

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[datadog-official]

⚠️ Warnings

🚦 7 Pipeline jobs failed

+audit (cargo deny + npm audit) | audit job npm     

+check (format + lint) | Feature Unification Check     

+check (format + lint) | Fomatting and Linting     

View all 7 failed jobs.

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