Combat Backend & Data Models

- Implement Combat Service
- Implement Damage Calculator
- Implement Effect Processor
- Implement Combat Actions
- Created Combat API Endpoints

api/app/data/enemies/goblin.yaml

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+# Goblin - Easy melee enemy (STR-focused)
+# A small, cunning creature that attacks in groups
+
+enemy_id: goblin
+name: Goblin Scout
+description: >
+  A small, green-skinned creature with pointed ears and sharp teeth.
+  Goblins are cowardly alone but dangerous in groups, using crude weapons
+  and dirty tactics to overwhelm their prey.
+
+base_stats:
+  strength: 8
+  dexterity: 12
+  constitution: 6
+  intelligence: 6
+  wisdom: 6
+  charisma: 4
+  luck: 8
+
+abilities:
+  - basic_attack
+
+loot_table:
+  - item_id: rusty_dagger
+    drop_chance: 0.15
+    quantity_min: 1
+    quantity_max: 1
+  - item_id: gold_coin
+    drop_chance: 0.50
+    quantity_min: 1
+    quantity_max: 3
+
+experience_reward: 15
+gold_reward_min: 2
+gold_reward_max: 8
+difficulty: easy
+
+tags:
+  - humanoid
+  - goblinoid
+  - small
+
+base_damage: 4
+crit_chance: 0.05
+flee_chance: 0.60