feat: bootstrap backend API, schema and forgejo task issues

backend/sql/schema.sql

@@ -0,0 +1,101 @@
+CREATE TABLE IF NOT EXISTS users (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  email VARCHAR(255) NOT NULL UNIQUE,
+  password_hash VARCHAR(255) NOT NULL,
+  display_name VARCHAR(120) NOT NULL,
+  phone_encrypted TEXT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS help_requests (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  requester_id BIGINT NOT NULL,
+  title VARCHAR(180) NOT NULL,
+  description TEXT NOT NULL,
+  value_chf DECIMAL(10,2) NOT NULL,
+  status ENUM('open','negotiating','agreed','completed','cancelled') DEFAULT 'open',
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (requester_id) REFERENCES users(id)
+);
+
+CREATE TABLE IF NOT EXISTS offers (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  request_id BIGINT NOT NULL,
+  helper_id BIGINT NOT NULL,
+  amount_chf DECIMAL(10,2) NOT NULL,
+  message TEXT NULL,
+  status ENUM('pending','countered','accepted','rejected') DEFAULT 'pending',
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (request_id) REFERENCES help_requests(id),
+  FOREIGN KEY (helper_id) REFERENCES users(id)
+);
+
+CREATE TABLE IF NOT EXISTS negotiations (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  offer_id BIGINT NOT NULL,
+  sender_id BIGINT NOT NULL,
+  amount_chf DECIMAL(10,2) NOT NULL,
+  message TEXT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (offer_id) REFERENCES offers(id),
+  FOREIGN KEY (sender_id) REFERENCES users(id)
+);
+
+CREATE TABLE IF NOT EXISTS deals (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  request_id BIGINT NOT NULL,
+  offer_id BIGINT NOT NULL,
+  agreed_amount_chf DECIMAL(10,2) NOT NULL,
+  agreed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  completed_at TIMESTAMP NULL,
+  FOREIGN KEY (request_id) REFERENCES help_requests(id),
+  FOREIGN KEY (offer_id) REFERENCES offers(id)
+);
+
+CREATE TABLE IF NOT EXISTS contact_exchange_requests (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  deal_id BIGINT NOT NULL,
+  requester_id BIGINT NOT NULL,
+  target_id BIGINT NOT NULL,
+  accepted BOOLEAN DEFAULT FALSE,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (deal_id) REFERENCES deals(id),
+  FOREIGN KEY (requester_id) REFERENCES users(id),
+  FOREIGN KEY (target_id) REFERENCES users(id)
+);
+
+CREATE TABLE IF NOT EXISTS addresses (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  user_id BIGINT NOT NULL,
+  address_encrypted TEXT NOT NULL,
+  postal_verified_at TIMESTAMP NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (user_id) REFERENCES users(id)
+);
+
+CREATE TABLE IF NOT EXISTS address_change_requests (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  user_id BIGINT NOT NULL,
+  new_address_encrypted TEXT NOT NULL,
+  verification_code_hash VARCHAR(255) NOT NULL,
+  status ENUM('pending_letter','verified','expired','rejected') DEFAULT 'pending_letter',
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  verified_at TIMESTAMP NULL,
+  FOREIGN KEY (user_id) REFERENCES users(id)
+);
+
+CREATE TABLE IF NOT EXISTS reviews (
+  id BIGINT PRIMARY KEY AUTO_INCREMENT,
+  deal_id BIGINT NOT NULL,
+  reviewer_id BIGINT NOT NULL,
+  reviewee_id BIGINT NOT NULL,
+  rating TINYINT NOT NULL,
+  comment TEXT NULL,
+  earliest_prompt_at TIMESTAMP NOT NULL,
+  latest_prompt_at TIMESTAMP NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (deal_id) REFERENCES deals(id),
+  FOREIGN KEY (reviewer_id) REFERENCES users(id),
+  FOREIGN KEY (reviewee_id) REFERENCES users(id),
+  CHECK (rating BETWEEN 1 AND 5)
+);