fix(epd): restore dropped bootstrap_room binding in decode generate_events

The rebase onto origin/main correctly dropped EPD's -1 bootstrap_token retry guard (subsumed by upstream's store-token-before-flipping-Success atomicity), but over-deleted the adjacent `bootstrap_room = self.receivers[req_id].bootstrap_room` binding, which is NOT part of the guard: it is the loop-local still read by pop_prefill_metadata(bootstrap_room) and pop_mrope_delta(bootstrap_room) in the same Bootstrapped+Success branch.

Without it, generate_events() raises NameError on the first completed prefill->decode transfer of every EPD decode run, wedging the decode scheduler. Invisible to build / py_compile / golden tree-equality (runtime-only). Restore the single binding (matches origin/main).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: chenht2022 <chenht2022@gmail.com>

Author: chenht2022

python/tokenspeed/runtime/pd/decode_executor.py

@@ -182,6 +182,7 @@ def generate_events(self):
                 # message from the prefill side.  bootstrap_room == bootstrap_info.bootstrap_room,
                 # which is the key used in MooncakeKVReceiver.
                 self._local_states[req_id] = KVPoll.Success
+                bootstrap_room = self.receivers[req_id].bootstrap_room
                 bootstrap_token, spec_candidate_ids = (
                     self.kv_manager.pop_prefill_metadata(bootstrap_room)
                 )