fix(rc.d): list ~/.rc.d with command ls in the login bridge

[basiliskus]

Summary

The ~/.rc.d login bridge (acq_login_profile_rc_block) lists snippets with $(LC_ALL=C ls "$HOME"/.rc.d). The login ~/.profile sources ~/.bashrc before that block, so in an interactive login shell a user's ls alias or function is already in effect when the block runs. Depending on the alias, snippets run in the wrong order (ls -r), are skipped (ls -F on an executable snippet, ls -Q), or are found only because their names appear among the words of a long listing (ls -l).

This switches the listing to LC_ALL=C command ls, which bypasses aliases and functions. The C collation, guards, and line count of the block (and so the heal's max_lines bound) are unchanged.

Related Issues

Fixes #587

Type of Change

• Bug fix (non-breaking change that fixes an issue)

Checklist

• I have read CONTRIBUTING.md
• My commits follow the Conventional Commits format (e.g., feat:, fix:, docs:)
• I have tested my changes locally
• I have updated documentation as needed
• I have not included any secrets, API keys, or sensitive information

Test Results

• New test rc.d: login-profile block ignores an ls alias or function from .bashrc (#587) (72-msb-agent-user.bats) runs the generated block with alias ls="ls -r" and, separately, an ls function that names one snippet twice and omits the other. Without the fix it fails (20-b then 10-a); with it, both cases source 10-a then 20-b.
• The two tests that pin the bridge text (72-msb-agent-user.bats, 90-sbx-startup-kit.bats) now assert LC_ALL=C command ls.
• bats --filter 'rc.d|#426' over both files: 14/14 pass. shellcheck -S warning acq.backends/common.sh: clean.
• Full ./scripts/test-acq-bats: 730 pass, 12 fail. The same 10 fail on unmodified main in this environment (clone, msys, migration-gate, dispatch, github-scope, and msb provision tests), and the other 2 are the sbx grammar acceptance tests, which need sbx login.