fix: P0-1 RateLimiter并发写安全 + P0-2工单操作错误码区分 + P1 rows.Close修复

P0-1 (limits.go): Allow()方法改为全程使用写锁保护counters map读写，避免RLock写入时的data race P0-2 (ticket_workflow.go+ticket_handler.go): Assign/Resolve/Close操作先查询ticket存在性和状态，返回明确的CS_TICKET_4001/CS_TKT_4002/CS_TICKET_4092/CS_TICKET_4093错误码，handler根据错误前缀路由HTTP状态码 P1-1 (ticket_store.go): 移除GetStats中3处手动rows.Close()，只保留defer Close()
2026-05-01 20:56:25 +08:00
parent bd2d848009
commit cf46b27610
103 changed files with 16428 additions and 0 deletions
--- a/db/migration/0001_init.up.sql
+++ b/db/migration/0001_init.up.sql
@@ -0,0 +1,71 @@
+CREATE EXTENSION IF NOT EXISTS pgcrypto;
+
+CREATE TABLE IF NOT EXISTS cs_sessions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    channel VARCHAR(16) NOT NULL,
+    open_id VARCHAR(128) NOT NULL,
+    user_id VARCHAR(64) NULL,
+    status VARCHAR(16) NOT NULL DEFAULT 'idle',
+    turn_count INT NOT NULL DEFAULT 0,
+    last_message_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    CONSTRAINT chk_cs_sessions_channel CHECK (channel IN ('telegram','discord','wechat','widget')),
+    CONSTRAINT chk_cs_sessions_status CHECK (status IN ('idle','processing','waiting_feedback','handoff','closed'))
+);
+CREATE INDEX IF NOT EXISTS idx_sessions_channel_openid ON cs_sessions(channel, open_id);
+
+CREATE TABLE IF NOT EXISTS cs_messages (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    session_id UUID NOT NULL REFERENCES cs_sessions(id) ON DELETE CASCADE,
+    direction VARCHAR(8) NOT NULL,
+    content TEXT NOT NULL,
+    content_type VARCHAR(16) NOT NULL DEFAULT 'text',
+    intent VARCHAR(32) NULL,
+    confidence NUMERIC(3,2) NULL,
+    model_provider VARCHAR(32) NULL,
+    latency_ms INT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    CONSTRAINT chk_cs_messages_direction CHECK (direction IN ('in','out'))
+);
+CREATE INDEX IF NOT EXISTS idx_messages_session_id ON cs_messages(session_id, created_at DESC);
+
+CREATE TABLE IF NOT EXISTS cs_tickets (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    session_id UUID NOT NULL REFERENCES cs_sessions(id) ON DELETE CASCADE,
+    user_id VARCHAR(64) NULL,
+    priority VARCHAR(4) NOT NULL,
+    status VARCHAR(16) NOT NULL DEFAULT 'open',
+    handoff_reason VARCHAR(32) NOT NULL,
+    assigned_to VARCHAR(64) NULL,
+    context_snapshot JSONB NOT NULL DEFAULT '{}'::jsonb,
+    resolution TEXT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    resolved_at TIMESTAMPTZ NULL,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    CONSTRAINT chk_cs_tickets_priority CHECK (priority IN ('P0','P1','P2','P3')),
+    CONSTRAINT chk_cs_tickets_status CHECK (status IN ('open','assigned','processing','resolved','closed'))
+);
+CREATE INDEX IF NOT EXISTS idx_tickets_status_priority ON cs_tickets(status, priority, created_at);
+
+CREATE TABLE IF NOT EXISTS cs_audit_logs (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id VARCHAR(64) NOT NULL,
+    object_type VARCHAR(32) NOT NULL,
+    object_id VARCHAR(64) NOT NULL,
+    action VARCHAR(16) NOT NULL,
+    before_state JSONB NULL,
+    after_state JSONB NULL,
+    actor_id VARCHAR(64) NOT NULL,
+    source_ip VARCHAR(45) NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE INDEX IF NOT EXISTS idx_audit_object ON cs_audit_logs(object_type, object_id, created_at DESC);
+
+CREATE TABLE IF NOT EXISTS cs_message_dedup (
+    channel VARCHAR(16) NOT NULL,
+    message_id VARCHAR(128) NOT NULL,
+    session_id UUID NULL REFERENCES cs_sessions(id) ON DELETE SET NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (channel, message_id)
+);