refactor: Consolidate database schema for first release

- Replace migration files with single schema.sql
- Include all current functionality in one file
- Add 10-point rating scale with half-star precision
- Remove old migration complexity for development
- Maintain all table constraints and indexes
- Add proper comments for rating system
- Prepare clean schema for first release deployment

database/schema/schema.sql

@@ -0,0 +1,84 @@
+-- Consolidated Bookmann Database Schema
+-- This file contains the complete current schema for the Bookmann ebook management system
+
+-- Create users table
+CREATE TABLE users (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    email VARCHAR(255) UNIQUE NOT NULL,
+    username VARCHAR(255) UNIQUE NOT NULL,
+    password_hash VARCHAR(255) NOT NULL,
+    first_name VARCHAR(255),
+    last_name VARCHAR(255),
+    theme VARCHAR(50) DEFAULT 'tokyo-night',
+    scan_frequency_minutes INTEGER DEFAULT 60,
+    auto_scan_enabled BOOLEAN DEFAULT true,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);
+
+-- Create ebooks table
+CREATE TABLE ebooks (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    title VARCHAR(255) NOT NULL,
+    author VARCHAR(255),
+    isbn VARCHAR(13),
+    description TEXT,
+    file_path VARCHAR(500) NOT NULL,
+    file_size BIGINT,
+    mime_type VARCHAR(100),
+    cover_image_path VARCHAR(500),
+    series VARCHAR(255),
+    series_number INTEGER,
+    tags TEXT,
+    asin VARCHAR(20),
+    date_published DATE,
+    publisher VARCHAR(255),
+    contributors TEXT,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);
+
+-- Create reading_progress table
+CREATE TABLE reading_progress (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    ebook_id UUID NOT NULL REFERENCES ebooks(id) ON DELETE CASCADE,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    current_page INTEGER DEFAULT 0,
+    total_pages INTEGER,
+    last_read_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    UNIQUE(ebook_id, user_id)
+);
+
+-- Create ebook_ratings table
+CREATE TABLE ebook_ratings (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    ebook_id UUID NOT NULL REFERENCES ebooks(id) ON DELETE CASCADE,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    rating INTEGER NOT NULL CHECK (rating >= 1 AND rating <= 10), -- 10-point scale for half-star precision
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    UNIQUE(ebook_id, user_id)
+);
+
+-- Create user_ebook_folders table for multiple folders per user
+CREATE TABLE user_ebook_folders (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    folder_path VARCHAR(500) NOT NULL,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    UNIQUE(user_id, folder_path)
+);
+
+-- Create indexes for better query performance
+CREATE INDEX idx_users_email ON users(email);
+CREATE INDEX idx_users_username ON users(username);
+CREATE INDEX idx_ebooks_title ON ebooks(title);
+CREATE INDEX idx_ebooks_author ON ebooks(author);
+CREATE INDEX idx_reading_progress_ebook_id ON reading_progress(ebook_id);
+CREATE INDEX idx_reading_progress_user_id ON reading_progress(user_id);
+CREATE INDEX idx_ebook_ratings_ebook_id ON ebook_ratings(ebook_id);
+CREATE INDEX idx_ebook_ratings_user_id ON ebook_ratings(user_id);
+CREATE INDEX idx_user_ebook_folders_user_id ON user_ebook_folders(user_id);
+
+-- Add comment explaining the rating system
+COMMENT ON COLUMN ebook_ratings.rating IS 'Rating scale 1-10 (odd numbers = half-stars: 1,3,5,7,9 = 0.5,1.5,2.5,3.5,4.5 stars)';