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49b9d9313e
cv.sensitive(...) now returns a SensitiveStr (thin str subclass) so the tag travels with the validated value. yaml_util.dump constructs a per-call ESPHomeDumper subclass with a class-attribute redaction flag; the PyYAML representer for SensitiveStr renders values wrapped in literal \\033[8m...\\033[28m text when show_secrets is False and raw when True. The post-dump regex in command_config is deleted. Also tags wifi.ssid sites with cv.sensitive so SSID coverage isn't lost when the regex (which matched 'ssid:' via substring) goes away. No module-level mutable state; the per-call subclass keeps each dump invocation self-contained and thread-safe by construction.
