[全量] 初始化项目代码、配置、文档及Agent协同harness

backend/application-local.yml

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+# 覆盖 jar 内过期的 application-yj.yml（当前 jar 仍含远程库 123.57.146.97，不配本会长时间卡 Druid）。
+# 完整 spring.redis + spring.datasource 与源码 application-yj.yml 对齐（本地 Docker 33306）。
+
+logging:
+  file:
+    name: ${user.home}/.gangyan/logs/spring.log
+
+spring:
+  redis:
+    open: true
+    database: 0
+    host: 127.0.0.1
+    port: 6379
+    password: ""
+    timeout: 6000
+    lettuce:
+      pool:
+        max-active: 1000
+        max-wait: -1
+        max-idle: 10
+        min-idle: 5
+  datasource:
+    type: com.alibaba.druid.pool.DruidDataSource
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://127.0.0.1:33306/chat_gpt_yj?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=GMT%2B8
+    username: root
+    password: "1234567890"
+    druid:
+      initialSize: 5
+      minIdle: 10
+      maxActive: 20
+      maxWait: 60000
+      timeBetweenEvictionRunsMillis: 60000
+      minEvictableIdleTimeMillis: 300000
+      maxEvictableIdleTimeMillis: 900000
+      validationQuery: SELECT 1 FROM DUAL
+      testWhileIdle: true
+      testOnBorrow: true
+      testOnReturn: false
+      keepAlive: true
+      phyTimeoutMillis: 600000
+      connectTimeout: 60000
+      poolPreparedStatements: true
+      filters: stat,wall,slf4j,config
+      useGlobalDataSourceStat: true
+      stat:
+        log-slow-sql: true
+        merge-sql: true
+        slow-sql-millis: 10000
+
+chat:
+  modelName: deepseek-v3