fix(rg): skip indexed prefilter for --crlf searches

[chaliy]

Motivation

• The indexed prefilter (try_indexed_search) could run when --crlf is enabled, but SearchQuery has no CRLF-aware flag, allowing indexed providers to incorrectly omit candidate files and cause false-negative matches for patterns like needle$ on CRLF files.
• The change forces fallback to the linear CRLF-aware matching path to preserve correctness when CRLF semantics are requested.

Description

• Disable the indexed prefilter for CRLF-aware searches by adding || opts.crlf to the early-return conditions in try_indexed_search in crates/bashkit/src/builtins/rg/mod.rs.
• Add a regression test test_rg_crlf_skips_indexed_prefilter_and_falls_back_to_linear_scan that constructs an IndexedTestFs with no index matches and verifies rg --crlf 'needle$' still finds the CRLF-terminated line via the linear scan.
• Adjusted the test assertion to match actual rg output for the linear path (needle\r\n).

Testing

• Ran the added test with cargo test -p bashkit test_rg_crlf_skips_indexed_prefilter_and_falls_back_to_linear_scan -- --nocapture, which initially surfaced the failing expectation and then passed after the assertion fix.
• Ran the package test suite; the new test passed and the test run completed without failures.

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Codex Task

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	bashkit	c950eb6	Commit Preview URL	May 25 2026, 02:41 AM