v1.1.0 — seed 真正控制域随机化；reset() 自动消费场景默认值

Added

• EnvConfig.seed — a run seed that actually reproduces the run. With domain_rand=True
  the LiDAR noise and the odometry drift used to come from the global np.random, so two
  runs with the same seed diverged. SimpleBridge(seed=...) now owns a
  np.random.Generator and every domain-randomisation draw goes through it;
  cs.make(seed=...) sets the run seed and — when sensor_seed is not given — also the
  sensor streams, through one rule implemented once
  (chassis_sim.config.resolve_sensor_seed):
  sensor_seed if sensor_seed is not None else (seed if seed is not None else 0).
  A bridge you construct yourself keeps ownership of its own randomness.
  Bit-for-bit compatibility: with seed=None the bridge still draws from the global
  np.random (verified identical to 1.0.2 on a clean worktree), and make(seed=3) alone
  still yields the same sensor streams and scenario maps as 1.0.2.

Changed

• env.reset() now consumes env.default_reset_options. cs.make(scenario=...) already
  stored the scenario keys on the env, but reset() ignored them unless you handed them
  over yourself — a forgotten options= silently fell back to the empty field. From this
  release reset(options=None) falls back to the stored defaults, while an explicit
  options= (including {}) always wins.

No other functional changes.