fix(memory): pin session_start + session_id on background review fork

Belt-and-suspenders complement to the cached-system-prompt inheritance:
pin session_start and session_id to the parent's so any code path that
re-renders parts of the system prompt (compression, plugin hooks)
still produces byte-identical output. The cached-prompt assignment
already short-circuits the normal rebuild path, but these pins
guarantee parity even if a future code path bypasses the cache.

Idea from simpolism's reference PR #25427 for #25322.

Co-Authored-By: simpolism <32201324+simpolism@users.noreply.github.com>

scripts/release.py

@@ -43,6 +43,8 @@ AUTHOR_MAP = {
     "teknium1@gmail.com": "teknium1",
     "30366221+WorldWriter@users.noreply.github.com": "WorldWriter",
     "dafeng@DafengdeMacBook-Pro.local": "WorldWriter",
+    "32201324+simpolism@users.noreply.github.com": "simpolism",
+    "simpolism@gmail.com": "simpolism",
     "mgongzai@gmail.com": "vKongv",
     "0x.badfriend@gmail.com": "discodirector",
     "altriatree@gmail.com": "TruaShamu",