Initial MVP: drivable RX-7 vertical slice + server-authoritative systems

- Rojo + Wally project; ProfileStore (loleris) for safe saves
- Shared: GameConfig, Cars (RX-7 free starter), ProfileTemplate, Remotes
- Server: DataManager, Economy, CarManager, RaceManager, MapBuilder, AntiCheat
- Client: neon HUD + Garage/Dealership UI (buy/equip/upgrade), race/daily
- Procedural Tokyo expressway (spawn pad, finish line, neon pylons, kill walls)
- CI workflow (Gitea/GitHub), Makefile, selene+stylua clean, rojo builds
- Docs: README, GDD, realistic solo ROADMAP

src/shared/ProfileTemplate.luau

@@ -0,0 +1,51 @@
+--!strict
+--[[
+	ProfileTemplate.luau
+	The canonical shape of a player's saved data. ProfileStore fills any
+	missing keys from this template automatically (safe forward-migration:
+	add a key here and existing players get the default on next load).
+
+	NEVER remove/rename a key without a migration plan — that's how saves break.
+]]
+
+local GameConfig = require(script.Parent.GameConfig)
+
+export type UpgradeLevels = {
+	Engine: number,
+	Tires: number,
+	Nitro: number,
+}
+
+export type OwnedCar = {
+	Id: string,
+	Upgrades: UpgradeLevels,
+}
+
+export type ProfileData = {
+	Cash: number,
+	Rep: number,
+	OwnedCars: { OwnedCar },
+	EquippedCarId: string,
+	LastDailyClaim: number, -- os.time() of last claim; 0 = never
+	TotalRaces: number,
+	Wins: number,
+	Version: number, -- schema version for future migrations
+}
+
+local ProfileTemplate: ProfileData = {
+	Cash = GameConfig.StartingCash,
+	Rep = GameConfig.StartingRep,
+	OwnedCars = {
+		{
+			Id = GameConfig.StartingCarId,
+			Upgrades = { Engine = 0, Tires = 0, Nitro = 0 },
+		},
+	},
+	EquippedCarId = GameConfig.StartingCarId,
+	LastDailyClaim = 0,
+	TotalRaces = 0,
+	Wins = 0,
+	Version = 1,
+}
+
+return ProfileTemplate