[ENTPROBE] per-call DELETE evidence

New permanent emitter capability: function-entry STATE probes (_entry_state_probe_pcs in emitter_c.py, emitted in the function PREAMBLE so they fire once per CALL, not per loop-iteration of the bb label) printing [ENTPROBE $PC] f x s83 sidx ret — call-time X, the $83 counter, a $E0-sentinel scan over $84-$B3, and the caller's JSR return address read from the stack.

Raw traces, ROM material, local paths, and personal data are not part of this public record.