fix(rg): avoid quadratic glob toggle recompilation

[chaliy]

Motivation

• Prevent parse-time CPU amplification where repeated --glob-case-insensitive/--no-glob-case-insensitive flags would recompile all prior non---iglob globs on each toggle, causing O(n^2) work and a potential CPU DoS during synchronous argument parsing.

Description

• Stop performing immediate set_glob_case_insensitive calls while iterating arguments and instead only flip the opts.glob_case_insensitive state during parsing.
• Apply the final glob case-insensitive mode once after argument parsing by calling opts.set_glob_case_insensitive(opts.glob_case_insensitive)?;, ensuring each non-iglob rule is recompiled at most once.

Testing

• Ran cargo test -p bashkit test_rg_real_rg_diff -- --nocapture, which compiled and executed the rg differential tests without error (tests completed successfully).

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Codex Task

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	bashkit	a3fc999	Commit Preview URL	May 25 2026, 02:29 AM