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/sable_quillworth.yaml

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+# Sable Quillworth / Sebastian Quillworth
+# SR | Support | Researcher
+# The knowledge-economy anchor. Researchers unlock skill upgrades and building
+# improvements, so this character is critical to demonstrating that the
+# profession assignment system has strategic depth beyond raw resource output.
+# Support role in combat — placed in the backrow, buffs the team.
+
+$schema: "xyvera/content-schema/character/v1"
+
+id: sable_quillworth
+
+name:
+  female: "Sable Quillworth"
+  male: "Sebastian Quillworth"
+
+rarity: SR
+combat_role: support
+profession: researcher
+region_origin: heartwood_vale
+element: "null"
+personality: methodical_curious
+
+base_stats:
+  hp: 760
+  attack: 95
+  defense: 110
+  speed: 90
+  crit_rate: 0.05
+  crit_damage: 1.5
+
+skills:
+  - id: analytical_boost
+    name: "Analytical Boost"
+    type: active
+    description: >
+      Increases all allies' ATK by 18% and DEF by 12% for 3 turns. At skill
+      level 3+, also removes one debuff from a random ally.
+    max_level: 5
+    upgrade_cost_per_level:
+      knowledge: 30
+      gold: 200
+
+  - id: field_notes
+    name: "Field Notes"
+    type: passive
+    description: >
+      Passive: at the start of each combat round, Sable gains 1 knowledge
+      (village resource) per enemy still alive (capped at 5 per round, 20 per combat).
+      Knowledge gained this way is credited to the player's balance at combat end.
+    max_level: 3
+    upgrade_cost_per_level:
+      knowledge: 20
+      gold: 150
+
+  - id: deep_study
+    name: "Deep Study"
+    type: passive
+    description: >
+      Village passive: when assigned to a Research Post, knowledge output is
+      increased by 30% and skill upgrade costs for all characters are reduced by 5%.
+      The cost reduction stacks additively if multiple researchers are assigned.
+    max_level: 5
+    upgrade_cost_per_level:
+      knowledge: 35
+      gold: 250
+
+suitability_bonuses:
+  primary_profession_multiplier: 1.5
+  secondary_professions: []  # purely academic; no secondary bonus
+
+bond_hooks:
+  - intellectual
+  - reserved
+  - hidden_warmth
+
+lore_summary: >
+  A librarian's assistant who was cataloguing a collection of supposedly mundane travel
+  journals when the pages started describing places she'd never heard of — and then
+  she was in one of them. She brought three notebooks and has already filled two.