Tune serialization component (not applied)

39byte residenthelper0610..0636; privateIFFscratch3EC6. Exact frozenHsourceentry9C65; replaceCALLmute9C6B CD4BC0 withJP0610 C31006. Thecaller alreadyPUSHed songAF andcompletedfirstbankcopy. Guard masks onlyMUTE/UNPACK/C070init andrestorescallerIFF beforefinalbankcopy8485. Bothcopiesremaininterruptible forIFF1. LOAD AF/fullflags andotherregisteroutputs preservedbeforetail; fullfunctionABI matchesoriginal.

PASS56 ABIcases,1411964maskedcriticalboundaries/276PCs,14concrete lostplayertick sourceinterleavings,28safe pendingIRQprefixcases. DIspan73110..419249componenttstates; maximum69.875ms atnominal6MHz, no nativeclaim. Leadmustevaluate finalIRQgaps andreserve/helper-scratch lifetimes.

Reproduce: python build_component.py; python interleavings.py; python finalize.py. Scriptswriteonlythisdirectory. Flatcompletecommon/bank6fixture usesoriginalplayer/unpacker andactualHfullregisterIRQwrapper; physicalfull16Kcopies andSAAoutputqualification remainleadwork. SourceHmediaimmutable86d027e5ec4fc32f153e30ec47119bc6900e2986a412fe15771a89e9b3cab386.
