朱子纯 / xlyNewAi

P4 retirement + code slim-down (~18.5k lines deleted), on top of the
intent-gate WIP (docs §17/§18 + agent/tool refinements):

- Delete old 8-scene multi-agent stack: XlyErpService, SceneSelector/
  Chati/ErpAi/DynamicTableNl2Sql agents, DynamicToolProvider (62 meta
  tools), Scene/ToolMeta/ParamRule entities+mappers+startup caches
- Delete whole milvus/tts/ocr packages, /api/tts + /api/ocr endpoints,
  tts.html, python stream_server.py; strip dead TTS JS from chat.html
  (playByIndex/handleNormalResponse had no callers)
- Three-pass orphan sweep: 17 dead utils, 16 dead entities, dead
  constants/exceptions, RedisService+RedisConfig, duplicate
  JacksonConfig, OperableChatMemoryProvider, old prompt generators;
  fold PageController into MvcConfig; trim OkHttpUtil 495→39 lines
- pom: ~35→13 deps (drop mybatis/JPA/webflux/tika/pdfbox/poi/jieba/
  jsoup/gson/fastjson2/springdoc/mapstruct/pagehelper/pinyin4j/
  spring-retry/jnr-ffi/hutool/ocr/milvus/embeddings; add starter-jdbc);
  war 200M+→48M
- application.yml: drop milvus/tts/ocr/tesseract/mybatis blocks;
  GlobalExceptionHandler returns plain {code,message} JSON
- docs: mark P4 retirement done in agent-architecture §13/§18

Verified: mvn clean package OK; boot smoke on :8199 (Started 0.9s,
/chat 200, health db UP). Old /api/tts & /api/ocr now 404 by design.

Roll L2 flow up to domain->domain adjacency (11 domains) with anchor
forms, form/tool counts, and the matching AI-agent scene. This is the
coarse L1 tier meant to live in the agent system prompt for routing;
L2/L3 stay as on-demand tools. Domains align to ai_agent's 8 business
智能体 (+ 基础资料/设备/其他 -> ERP代理人).

Materialize each form's L2 neighbors (upstream/downstream documents) and
L3 neighbors (referenced entity tables) so the retriever can expand a
vector-recalled form-card into a subgraph context via a single JOIN.
702 forms have downstream, 476 upstream, 1467 reference entity tables.