Initial commit: Transcience MVP

Top-down twin-stick bullet-hell, Godot 4.7, server-authoritative dedicated
server with client-side prediction. Clients send input only; the server
resolves every hit for both players and enemies (no PvP).

- SimWorld: whole simulation as plain RefCounted objects (no nodes, no
  physics server), ~0.24ms/tick at peak load -- runs headless for free and
  drives 78 tests in under a second
- BulletPool: struct-of-arrays bullet storage, replicated as spawn/despawn
  events rather than per-tick state
- Emitter framework (Ring/AimedSpread/WallGap/ArcSweep) shared by trash
  enemies and bosses -- a new boss is data in src/content/content.gd, no
  simulation changes
- The Warden of the Fold: stationary 4-phase boss built entirely on that
  format
- Lobby hub with a portal into on-demand dungeon instances; one process
  hosts the hub plus every concurrent dungeon
- Emergency escape: 3s server-owned channel, cancelled by damage
- tools/check.sh, test.sh (GUT), smoke.sh (real server + bot clients over
  ENet), bench.gd; git hooks wired to the same scripts
- docs/ARCHITECTURE.md, NETCODE.md, WORKFLOW.md, ROADMAP.md

resources/enemies/drifter.tres

@@ -0,0 +1,23 @@
+[gd_resource type="Resource" script_class="EnemyDef" format=3]
+
+[ext_resource type="Script" path="res://src/sim/patterns/bullet_emitter.gd" id="1_801wv"]
+[ext_resource type="Script" path="res://src/sim/patterns/aimed_spread_emitter.gd" id="2_bjhtk"]
+[ext_resource type="Script" path="res://src/actors/enemies/enemy_def.gd" id="3_e6oj1"]
+
+[sub_resource type="Resource" id="Resource_vpd04"]
+script = ExtResource("2_bjhtk")
+count = 3
+spread_deg = 20.0
+interval = 120
+radius = 6.0
+lifetime = 240
+damage = 10
+
+[resource]
+script = ExtResource("3_e6oj1")
+id = &"drifter"
+display_name = "Drifter"
+contact_damage = 8
+speed = 55.0
+emitters = Array[ExtResource("1_801wv")]([SubResource("Resource_vpd04")])
+pattern_loop_ticks = 120

resources/enemies/dummy.tres

@@ -0,0 +1,14 @@
+[gd_resource type="Resource" script_class="EnemyDef" format=3]
+
+[ext_resource type="Script" path="res://src/sim/patterns/bullet_emitter.gd" id="1_ajtny"]
+[ext_resource type="Script" path="res://src/actors/enemies/enemy_def.gd" id="2_i7w5w"]
+
+[resource]
+script = ExtResource("2_i7w5w")
+id = &"dummy"
+display_name = "Target Dummy"
+max_hp = 100000
+radius = 20.0
+contact_damage = 0
+move = 0
+visual = 3

resources/enemies/stalker.tres

@@ -0,0 +1,16 @@
+[gd_resource type="Resource" script_class="EnemyDef" format=3]
+
+[ext_resource type="Script" path="res://src/sim/patterns/bullet_emitter.gd" id="1_dkoo8"]
+[ext_resource type="Script" path="res://src/actors/enemies/enemy_def.gd" id="2_t1lyl"]
+
+[resource]
+script = ExtResource("2_t1lyl")
+id = &"stalker"
+display_name = "Stalker"
+max_hp = 30
+radius = 12.0
+contact_damage = 16
+move = 3
+speed = 95.0
+retarget_interval = 20
+visual = 2

resources/enemies/turret.tres

@@ -0,0 +1,25 @@
+[gd_resource type="Resource" script_class="EnemyDef" format=3]
+
+[ext_resource type="Script" path="res://src/sim/patterns/bullet_emitter.gd" id="1_asksf"]
+[ext_resource type="Script" path="res://src/sim/patterns/ring_emitter.gd" id="2_7m5d5"]
+[ext_resource type="Script" path="res://src/actors/enemies/enemy_def.gd" id="3_5udip"]
+
+[sub_resource type="Resource" id="Resource_hc01i"]
+script = ExtResource("2_7m5d5")
+count = 10
+spin_per_shot_deg = 18.0
+interval = 150
+speed = 130.0
+
+[resource]
+script = ExtResource("3_5udip")
+id = &"turret"
+display_name = "Turret"
+max_hp = 70
+radius = 16.0
+contact_damage = 0
+move = 0
+speed = 0.0
+visual = 1
+emitters = Array[ExtResource("1_asksf")]([SubResource("Resource_hc01i")])
+pattern_loop_ticks = 150