SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.
ENV Spring=6.2.11 Java=21.0.11
CHECK PASS first source wins per property and missing key falls through
CHECK PASS profile expression selects production definition
CHECK PASS true condition registers notification
CHECK PASS live environment sees replacement
CHECK PASS existing singleton is not recreated by property changes
CHECK PASS definition selection is not reevaluated after refresh
CHECK PASS explicit placeholder lookup reads current property sources
CHECK PASS required property fails explicitly -> IllegalStateException
CHECK PASS new context applies test profile
CHECK PASS false condition omits definition
CHECK PASS new context constructs its own pricing singleton
