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

2026-08-21 18:30:13 +08:00
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+-- Add billing_model_source to channels (controls whether billing uses requested or upstream model)
+ALTER TABLE channels ADD COLUMN IF NOT EXISTS billing_model_source VARCHAR(20) DEFAULT 'requested';
+
+-- Add channel tracking fields to usage_logs
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS channel_id BIGINT;
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS model_mapping_chain VARCHAR(500);
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS billing_tier VARCHAR(50);