Prepare direct clients for Summit descriptors

[charlesHetterich]

Summary

• Select Summit product-sdk descriptors for direct PAPI clients when the active/requested env is summit.
• Thread env-aware descriptor selection through registry, contract deploy, Bulletin auth checks, and Playground metadata upload.
• Keep tests config-default agnostic so the Summit switch can remain a separate change.

Testing

• pnpm format:check
• pnpm lint:license
• pnpm typecheck
• pnpm test

[github-actions]

Dev build ready — try this branch:

curl -fsSL https://raw.githubusercontent.com/paritytech/playground-cli/main/install.sh | VERSION=dev/chore/summit-descriptor-support bash

[github-actions]

E2E Test Pass · ❌ FAIL

Tag: e2e-ci-pr · Branch: chore/summit-descriptor-support · Commit: a5389e8 · Run logs

Cell	Result	Time
pr-deploy-cdm	✅ PASS	4m07s
pr-mod	❌ FAIL	2m40s
pr-deploy-foundry	✅ PASS	1m13s
pr-login-session	❌ FAIL	5m06s
pr-install	✅ PASS	1m06s
pr-preflight	❌ FAIL	2m36s
pr-deploy-frontend	❌ FAIL	4m47s
${{ matrix.cell }}	⏭️ SKIP	0m-1s
${{ matrix.cell }}	⏭️ SKIP	0m-9s

❌ Failed tests (2)

• e2e/cli/deploy.test.ts › dot deploy — preflight and validation > reports mainnet not yet supported
  expected non-zero exit for --env mainnet, got 0 ╭────────────────────────────────────────────────────────────────────────────╮ │ Join the competition first │ │ Playground commands are for builders who've joined the competition, so you │ │ need to be signed in first. │ │ │ │ Run playground login and scan the QR code with your Polkadot mobile app, │ │ then become a builder and join the competition at playground.dot in your │ │ desktop app. │ ╰────────────────────────────────────────────────────────────────────────────╯ : expected +0 not to be +0 // Object.is equality
• e2e/cli/deploy.test.ts › dot deploy — preflight and validation > domain availability check runs before build/upload
  availability banner not found: ╭────────────────────────────────────────────────────────────────────────────╮ │ Join the competition first │ │ Playground commands are for builders who've joined the competition, so you │ │ need to be signed in first. │ │ │ │ Run playground login and scan the QR code with your Polkadot mobile app, │ │ then become a builder and join the competition at playground.dot in your │ │ desktop app. │ ╰────────────────────────────────────────────────────────────────────────────╯ : expected -1 to be greater than -1

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