Share posted deployment links with their scope

[16francej]

When the owner of a published app posts its URL into a shared channel or group conversation, grant that scope read access so every member can reach it. Lookalike URLs and non-owner posts are ignored.

• verification: node --test test/deployment-link-share.test.ts (new regressions) plus existing deployment authz suites pass; typecheck and lint clean

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[time-attack]

Thanks for this, @16francej — and sorry for the slow response.

We're closing this PR. Per CONTRIBUTING.md, since coding agents write most of the underlying code now, we'd rather receive feature ideas as a short human-written note in adrs/ — informal is great, just the idea in your own words — and bugs as a plain issue. If we're aligned we're happy to burn our own tokens on the implementation, and we'll credit you as co-author.

We don't want your idea to get lost, so we've captured it in #751 to triage on our side. Please feel free to open an adrs/ note if you feel strongly about the approach. Appreciate you engaging with the repo!