CapabilityService._emit_audit was already the single audit call site for
both transports since T02, but nothing failed if a future change diverged
one transport's shape. Add tests/test_audit_parity.py: same capability
called through protocol="rest" and protocol="mcp" (allow path and deny
path) must produce identical audit events except request_id/timestamp/
latency_ms (expected to vary) and protocol (expected to differ). Also pins
down that no audit event ever contains a secret-shaped field name.
Confirmed via grep: no State Hub coupling anywhere in src/qonto_assistant/
-- the only audit sink is AuditLogger, so there's no per-call hot-path
write to accidentally wire up.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
