03cbf4c8db
Findings: industry paradigm research (watchdog-retry is the norm, mid-stream hedging has no public precedent; pi-tps threshold-based stall deduction; Gregg off-CPU paired reporting; vLLM exclusion clauses). Design: generation_ms redefined as net generation time (wall minus all inter-chunk stalls over threshold), CallStats gains stall_ms/stall_count, HEDGE__STALL_AFTER_S mid-stream hedge independent of HEDGE__AFTER_S. Issues #27 #28.