Reinforcement Beacons Fixed - v4.5

• Checks memory protection only immediately before its single write instead of on every snapshot, twice per frame; in game that query costs about 0.3 ms each.
• Repeats the after-update check only while a reinforcement is in progress, reads the automatic stratagem rows in one read, and reuses one read buffer.
• Measured in real play: about 0.99 ms to 0.03 ms of main-thread time per frame in missions, and 0.59 ms to 0.02 ms aboard the ship. Corrections are unchanged; a beacon correction was confirmed live.