0.20.3.0 - Reliability Fixes, Minor QOL / Balance Tweaks

Upgrade to go lang 1.26.3.
Upgrade to ebiten 2.9.9.
Android: Improve reliability and clarity when google cloud save is extremely slow or cannot be reached on startup.
Militia ship type is now correctly categorized as a civilian ship (previously, it was mistakenly a 'flagship').
Fix bug where some buildings granted you the wrong amount of resources when you built them with the 'start with building' prestige abilities.
Bugfix for 'json: unsupported value: NaN' errors seen by some users.
Fix an old bug where offline calculations can rarely spin forever.
Fix bug where the new subverter boss was supposed to have reduced damage taken from offensive ships, but didn't.
General safety guard rails for when values get extremely high in the very late game.