MVP

backend/database/init.sql

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+CREATE EXTENSION IF NOT EXISTS pgcrypto;
+
+CREATE TABLE IF NOT EXISTS calibers (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  name VARCHAR(40) NOT NULL UNIQUE,
+  is_default BOOLEAN NOT NULL DEFAULT FALSE,
+  is_active BOOLEAN NOT NULL DEFAULT TRUE,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS firearms (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  manufacturer VARCHAR(120) NOT NULL,
+  model VARCHAR(120) NOT NULL,
+  category VARCHAR(80) NOT NULL,
+  caliber VARCHAR(40) NOT NULL,
+  serial_number VARCHAR(120) NOT NULL UNIQUE,
+  purchase_price NUMERIC(10, 2) NOT NULL DEFAULT 0,
+  acquired_on DATE,
+  image_url TEXT,
+  notes TEXT,
+  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS ammo_inventory (
+  caliber_id UUID PRIMARY KEY REFERENCES calibers(id) ON DELETE CASCADE,
+  rounds_on_hand INT NOT NULL DEFAULT 0 CHECK (rounds_on_hand >= 0),
+  cost_per_round NUMERIC(10, 2) NOT NULL DEFAULT 0,
+  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+INSERT INTO calibers (name, is_default, is_active)
+VALUES
+  ('9mm', TRUE, TRUE),
+  ('.22 LR', TRUE, TRUE),
+  ('5.56 NATO', TRUE, TRUE),
+  ('.308 Win', TRUE, TRUE),
+  ('12 Gauge', TRUE, TRUE),
+  ('.45 ACP', TRUE, TRUE)
+ON CONFLICT (name) DO NOTHING;
+
+INSERT INTO ammo_inventory (caliber_id, rounds_on_hand, cost_per_round)
+SELECT id, 0, 0
+FROM calibers
+ON CONFLICT (caliber_id) DO NOTHING;