fix: preserve market peer policy in generation installs

[yaojin3616]

Desktop discarded the market’s --config.auto-install-peers=false retry option when converting an install into an isolated generation. Installing @kenz1117/dsh-ui-usage-billing@1.2.5 could therefore keep fetching an obsolete host peer and fail on the unpublished dsh-type-meta dependency even after the market requested recovery.

Forward the explicit boolean peer policy to the generation pnpm subprocess, supporting both kebab-case and camelCase. When omitted, inherit the Profile workspace’s explicit autoInstallPeers boolean so release-age recovery cannot consume the only retry before peer recovery. Without either setting pnpm retains its default. This is a targeted contract fix, not arbitrary pnpm argument forwarding or a change to third-party market code. Only the peer boolean is inherited; workspace paths and upstream version re-resolution are outside this change.

Validation:

• 58 tests passed across generation-boundary, generation-installer, and market-installer.
• Regression exercises failure then retry through the actual subprocess boundary, verifies both option spellings, and checks that version 1.2.4 is retained and visible after publication.
• Production build and git diff --check passed.
• Typecheck is blocked by existing TS18048 errors in test/desktop-client-ui.test.ts:108–109; that file is byte-identical to base main (5a93138).
• Real dev Profile installation of the reported plugin succeeded through the generation boundary and published version 1.2.5. Added coverage for release-age failure followed by retry with inherited peer policy. Packaged Windows acceptance remains unverified.