refactor: 将客服后端重构为宿主可嵌入模块

- 注入数据库、运行时配置、统一响应、文件存储和平台 AI 能力，补充业务读写工具与客户快捷操作契约。

- 移除模块内重复的组织、客户、工单、标签、技能、旧工作流、MCP 和迁移实现，将身份权限与业务主体交由宿主管理。

- 使用 libSQL 重构向量存储，并完善图片消息、访客身份、排队调度、企业微信和支持聊天页面。

- 统一 HTTP、DTO 与 WebSocket 的 snake_case 协议，补齐模块初始化、业务动作和公共载荷等回归测试。

go.mod

@@ -17,10 +17,8 @@ require (
 	github.com/microcosm-cc/bluemonday v1.0.26
 	github.com/mlogclub/codegen v1.0.3
 	github.com/mlogclub/simple v1.2.40
-	github.com/modelcontextprotocol/go-sdk v1.4.1
 	github.com/openai/openai-go/v3 v3.28.0
 	github.com/panjf2000/ants/v2 v2.12.0
-	github.com/qdrant/go-client v1.17.1
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/silenceper/wechat/v2 v2.1.12
 	github.com/spf13/cast v1.10.0
@@ -31,18 +29,18 @@ require (
 	golang.org/x/net v0.56.0
 	golang.org/x/tools v0.46.0
 	gopkg.in/yaml.v3 v3.0.1
-	gorm.io/driver/mysql v1.5.7
 	gorm.io/driver/postgres v1.5.9
 	gorm.io/gorm v1.25.12
+	turso.tech/database/tursogo v0.6.1
 )
 
 require (
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
-	github.com/golang-jwt/jwt/v5 v5.3.1 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
 	github.com/jackc/pgx/v5 v5.5.5 // indirect
 	github.com/jackc/puddle/v2 v2.2.1 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/sagikazarmark/locafero v0.11.0 // indirect
 	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
 	github.com/spf13/afero v1.15.0 // indirect
@@ -50,12 +48,10 @@ require (
 	github.com/subosito/gotenv v1.6.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/crypto v0.53.0 // indirect
-	golang.org/x/oauth2 v0.36.0 // indirect
 	golang.org/x/text v0.38.0 // indirect
 )
 
 require (
-	github.com/apache/arrow/go/v17 v17.0.0
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/bahlo/generic-list-go v0.2.0 // indirect
 	github.com/bradfitz/gomemcache v0.0.0-20220106215444-fb4bf637b56d // indirect
@@ -68,6 +64,7 @@ require (
 	github.com/cloudwego/eino-ext/libs/acl/openai v0.1.17 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/ebitengine/purego v0.9.1 // indirect
 	github.com/evanphx/json-patch v0.5.2 // indirect
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.12 // indirect
@@ -76,20 +73,15 @@ require (
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-redis/redis/v8 v8.11.5 // indirect
-	github.com/go-sql-driver/mysql v1.7.0 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/goccy/go-yaml v1.19.2 // indirect
-	github.com/google/flatbuffers v24.3.25+incompatible // indirect
-	github.com/google/jsonschema-go v0.4.2 // indirect
 	github.com/goph/emperror v0.17.2 // indirect
 	github.com/gorilla/css v1.0.0 // indirect
 	github.com/iris-contrib/go.uuid v2.0.0+incompatible // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/compress v1.18.4 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
-	github.com/lancedb/lancedb-go v0.1.2
 	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/mailru/easyjson v0.9.2 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
@@ -100,15 +92,12 @@ require (
 	github.com/nikolalohinski/gonja v1.5.3 // indirect
 	github.com/nxadm/tail v1.4.11 // indirect
 	github.com/pelletier/go-toml/v2 v2.3.1 // indirect
-	github.com/pierrec/lz4/v4 v4.1.21 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/quic-go/qpack v0.6.0 // indirect
 	github.com/quic-go/quic-go v0.59.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/richardlehane/mscfb v1.0.6 // indirect
 	github.com/richardlehane/msoleps v1.0.6 // indirect
-	github.com/segmentio/asm v1.2.1 // indirect
-	github.com/segmentio/encoding v0.5.4 // indirect
 	github.com/sirupsen/logrus v1.9.4 // indirect
 	github.com/slongfield/pyfmt v0.0.0-20220222012616-ea85ff4c361f // indirect
 	github.com/tidwall/gjson v1.18.0 // indirect
@@ -116,25 +105,19 @@ require (
 	github.com/tidwall/pretty v1.2.1 // indirect
 	github.com/tidwall/sjson v1.2.5 // indirect
 	github.com/tiendc/go-deepcopy v1.7.2 // indirect
+	github.com/tursodatabase/turso-go-platform-libs v0.6.1 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.3.1 // indirect
 	github.com/xuri/efp v0.0.1 // indirect
 	github.com/xuri/nfp v0.0.2-0.20250530014748-2ddeb826f9a9 // indirect
 	github.com/yargevad/filepathx v1.0.0 // indirect
-	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
-	github.com/zeebo/xxh3 v1.0.2 // indirect
 	go.mongodb.org/mongo-driver/v2 v2.5.0 // indirect
-	go.opentelemetry.io/otel v1.42.0 // indirect
 	golang.org/x/arch v0.28.0 // indirect
 	golang.org/x/exp v0.0.0-20260611194520-c48552f49976 // indirect
 	golang.org/x/mod v0.37.0 // indirect
 	golang.org/x/sync v0.21.0 // indirect
 	golang.org/x/sys v0.46.0 // indirect
-	golang.org/x/telemetry v0.0.0-20260610154732-fb80ec83bdd9 // indirect
 	golang.org/x/time v0.14.0 // indirect
-	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 // indirect
-	google.golang.org/grpc v1.78.0 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	modernc.org/libc v1.41.0 // indirect
 	modernc.org/mathutil v1.6.0 // indirect