clients: replace lifetime-annotated Request with owned String field

[ooloth]

✅ What

• Replaces &'a str with String in the Request struct in clients/src/linear.rs, removing its lifetime parameter entirely
• Calls .to_string() at the single construction site

🤔 Why

• The lifetime annotation on Request forced callers to ensure the query string outlived the struct, adding hidden constraints that resist refactoring
• The struct is constructed and immediately serialized — it has no reason to borrow; owning is the right choice

👩‍🔬 How to validate

• Open clients/src/linear.rs and expect struct Request { query: String } with no 'a lifetime parameter
• Search the file for Request { and expect the construction site to use .to_string()
• Run cargo check from the workspace root and expect zero errors

🔖 Related links

• Replace lifetime-annotated Request struct in linear.rs with owned String field #67
• https://claude.ai/code/

Closes #67

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[Copilot]

Pull request overview

Removes the lifetime parameter from the Request struct in clients/src/linear.rs by changing its query field from &'a str to an owned String, simplifying lifetime management at the cost of one allocation per call.

Changes:

• Replace struct Request<'a> { query: &'a str } with struct Request { query: String }
• Update the single construction site to call .to_string() on the query

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[ooloth]

CI failure is pre-existing and unrelated to this PR.

The two failing tests (fetch::tests::ensure_pr_worktree_reentry_fetches_remote_tracking_refs and fetch::tests::sync_default_branch_worktree_fetches_then_resets_to_latest_commit) fail identically on main — they appear to require a real git remote/network that isn't available in the CI environment. The changes in this PR touch only clients/src/linear.rs and have no effect on workflows/src/fetch.rs.

cargo fmt --check and cargo clippy -- -D warnings both pass clean on this branch.

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Generated by Claude Code