Pre-registers the E4 experiment that tests whether KVC + D→P RDMA
snapshot push beats the naive PD-disagg E1 baseline on the
inferact_50sess subset. Compared to E3 the only changed flag is
--enable-d-to-p-sync.
Three hypotheses (see docs/E4_PROTOCOL_ZH.md §2.3):
H1 (main): E4 TTFT p99 ≤ E1 TTFT p99
H2: E4 reseed-mode TTFT < E3 reseed-mode TTFT
H3: E4 success count ≥ E3 success count
The full reseed → snapshot-push orchestration is wired in b9b0cf0
(_attempt_d_to_p_sync); the SGLang scheduler RPCs and the runtime
mem-leak fix are in 86412bb / a369722.
8a2f72f18e