Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/migrations/066_add_scheduled_test_tables.sql

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+-- 066_add_scheduled_test_tables.sql
+-- Scheduled account test plans and results
+
+CREATE TABLE IF NOT EXISTS scheduled_test_plans (
+    id              BIGSERIAL PRIMARY KEY,
+    account_id      BIGINT NOT NULL REFERENCES accounts(id) ON DELETE CASCADE,
+    model_id        VARCHAR(100) NOT NULL DEFAULT '',
+    cron_expression VARCHAR(100) NOT NULL DEFAULT '*/30 * * * *',
+    enabled         BOOLEAN NOT NULL DEFAULT true,
+    max_results     INT NOT NULL DEFAULT 50,
+    last_run_at     TIMESTAMPTZ,
+    next_run_at     TIMESTAMPTZ,
+    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE INDEX IF NOT EXISTS idx_stp_account_id ON scheduled_test_plans(account_id);
+CREATE INDEX IF NOT EXISTS idx_stp_enabled_next_run ON scheduled_test_plans(enabled, next_run_at) WHERE enabled = true;
+
+CREATE TABLE IF NOT EXISTS scheduled_test_results (
+    id            BIGSERIAL PRIMARY KEY,
+    plan_id       BIGINT NOT NULL REFERENCES scheduled_test_plans(id) ON DELETE CASCADE,
+    status        VARCHAR(20) NOT NULL DEFAULT 'success',
+    response_text TEXT NOT NULL DEFAULT '',
+    error_message TEXT NOT NULL DEFAULT '',
+    latency_ms    BIGINT NOT NULL DEFAULT 0,
+    started_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    finished_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE INDEX IF NOT EXISTS idx_str_plan_created ON scheduled_test_results(plan_id, created_at DESC);