add branch v1

init/sqlite3/init.sql

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+-- SQLite3 initialization SQL
+
+-- Enable WAL mode for better concurrency (simple performance boost)
+PRAGMA journal_mode = WAL;
+PRAGMA synchronous = NORMAL;
+
+-- Enable foreign key support
+PRAGMA foreign_keys = ON;
+
+-- 创建tokens表
+CREATE TABLE IF NOT EXISTS tokens (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id TEXT NOT NULL,
+    issuer TEXT NOT NULL,
+    account TEXT NOT NULL,
+    secret TEXT NOT NULL CHECK (length(secret) >= 16 AND secret REGEXP '^[A-Z2-7]+=*$'),
+    type TEXT NOT NULL CHECK (type IN ('HOTP', 'TOTP')),
+    counter INTEGER CHECK (
+        (type = 'HOTP' AND counter >= 0) OR 
+        (type = 'TOTP' AND counter IS NULL)
+    ),
+    period INTEGER DEFAULT 30 CHECK (
+        (type = 'TOTP' AND period >= 30) OR 
+        (type = 'HOTP' AND period IS NULL)
+    ),
+    digits INTEGER NOT NULL DEFAULT 6 CHECK (digits IN (6, 8)),
+    algo TEXT NOT NULL DEFAULT 'SHA1' CHECK (algo IN ('SHA1', 'SHA256', 'SHA512')),
+    created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+    updated_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+    UNIQUE(user_id, issuer, account)
+);
+
+-- 基本索引
+CREATE INDEX IF NOT EXISTS idx_tokens_user_id ON tokens(user_id);
+CREATE INDEX IF NOT EXISTS idx_tokens_lookup ON tokens(user_id, issuer, account);
+CREATE INDEX IF NOT EXISTS idx_tokens_hotp ON tokens(user_id) WHERE type = 'HOTP';
+CREATE INDEX IF NOT EXISTS idx_tokens_totp ON tokens(user_id) WHERE type = 'TOTP';
+
+-- 简化统计视图
+CREATE VIEW IF NOT EXISTS v_token_stats AS
+SELECT 
+    user_id,
+    COUNT(*) as total_tokens,
+    SUM(type = 'HOTP') as hotp_count,
+    SUM(type = 'TOTP') as totp_count
+FROM tokens 
+GROUP BY user_id;
+
+-- 设置版本号
+PRAGMA user_version = 1;