Initial scaffold: Nakama backend, Godot client, content schema

Sets up the Step 1 (Project Foundation) and Step 2 (Content Schemas) scaffold
from the implementation sequence. Includes Docker Compose stack, Nakama
TypeScript module stubs, PostgreSQL migration, Godot 4 project shell with
scene stubs and NakamaClient singleton, YAML content schemas for all entity
types, and example data for 3 characters, 2 jobs, and all 7 core resources.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

content/data/characters/ember_ashvale.yaml

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+# Ember Ashvale / Ezra Ashvale
+# SR | Glass Cannon | Lumberjack
+# The player's first realistic gacha pull in the standard banner.
+# SR rarity — reliable specialist who makes the early economy viable.
+# Designed to demonstrate that non-SSR characters stay meaningfully useful:
+# her lumberjack bonus feeds the wood bottleneck that the manual work system
+# is built around.
+
+$schema: "xyvera/content-schema/character/v1"
+
+id: ember_ashvale
+
+name:
+  female: "Ember Ashvale"
+  male: "Ezra Ashvale"
+
+rarity: SR
+combat_role: glass_cannon
+profession: lumberjack
+region_origin: heartwood_vale
+element: fire
+personality: energetic_optimist
+
+base_stats:
+  hp: 680
+  attack: 195
+  defense: 60
+  speed: 115
+  crit_rate: 0.10
+  crit_damage: 1.8
+
+skills:
+  - id: blaze_cut
+    name: "Blaze Cut"
+    type: active
+    description: >
+      Deals 220% ATK as fire damage to one enemy. If the target is on fire (burning
+      status), also deals 80% ATK bonus damage.
+    max_level: 5
+    upgrade_cost_per_level:
+      knowledge: 25
+      gold: 180
+
+  - id: sawdust_flurry
+    name: "Sawdust Flurry"
+    type: passive
+    description: >
+      Passive: each time Ember defeats an enemy, she gains +8% attack speed for
+      2 turns (stacks up to 3 times).
+    max_level: 3
+    upgrade_cost_per_level:
+      knowledge: 15
+      gold: 120
+
+  - id: quick_harvest
+    name: "Quick Harvest"
+    type: passive
+    description: >
+      Village passive: when assigned to a Lumber Camp slot, adds a 20% chance per
+      hour to produce a bonus burst of wood equal to 30 minutes of base output.
+      This bonus chance does not require manual input.
+    max_level: 5
+    upgrade_cost_per_level:
+      knowledge: 10
+      gold: 80
+
+suitability_bonuses:
+  primary_profession_multiplier: 1.5
+  secondary_professions:
+    - farmer  # comfortable outdoors
+
+bond_hooks:
+  - cheerful
+  - mentor_target
+  - competitive
+
+lore_summary: >
+  An apprentice woodcutter who followed a glowing deer into a forest and came out
+  somewhere entirely different. She's still looking for the deer, but in the meantime
+  the logs aren't going to cut themselves.