#69090 scoped MATRIX_RECOVERY_KEY itself (via _scoped_recovery_key())
so a secondary profile resolves its own recovery key under multiplex,
but left its sibling, MATRIX_RECOVERY_KEY_OUTPUT_FILE, on a bare
os.getenv(). _recovery_key_output_path() is called from inside
_verify_or_bootstrap_cross_signing(), which runs fully inside
_profile_runtime_scope for a secondary profile: when that profile
bootstraps a new recovery key, it either doesn't get written to a
file at all, or gets written to the default profile's configured
path, depending on which one has the env var set.
Route it through the same _get_scoped_secret() helper _scoped_recovery_key()
already uses.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
(cherry picked from commit fb765ee49b2f1a1853e52fb901d25f767180a2fc)
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