chore(product): 废弃并删除 db/sync_dim_style.py

采集端运行时身份已改为直接读 dim_style，这个脚本的投影方向变成"自己写自己"：
既补不了旧 cmt_styles 台账数据，upsert 又是 EXCLUDED 全量覆盖，跑一次有可能把
空值写回 dim_style。款式新增与改款统一走 data-hub「产品生命进程」建档页。

- 删除 src/gyxx_flow/modules/product_commerce/db/sync_dim_style.py（390 行）
- 移除 config/runtime-bindings.json 绑定（cdp_port 22070）与 source-manifests 条目
- 测试计数同步：PRODUCTION_PYTHON 65 -> 64，集成绑定 158 -> 157
- docs/dynamic-workflow-config.md 补废弃说明；运行时路径图与表说明由 cmt_styles
  更正为 dim_style
- db/__init__.py 表来源说明同步

验证：tests 根级套件 11 failed / 820 passed，与改动前完全一致（失败均为清单
sha256 与既有环境问题，非本次引入）。

config/runtime-bindings.json

@@ -1119,14 +1119,6 @@
       ],
       "cdp_port": 22163
     },
-    "product_commerce:db/sync_dim_style.py": {
-      "script_id": "product_commerce:db/sync_dim_style.py",
-      "state_key": "product_commerce:db/sync_dim_style.py",
-      "aliases": [
-        "product_commerce:db/sync_dim_style.py"
-      ],
-      "cdp_port": 22070
-    },
     "product_commerce:db/sync_sku_master.py": {
       "script_id": "product_commerce:db/sync_sku_master.py",
       "state_key": "product_commerce:db/sync_sku_master.py",

config/source-manifests/product_commerce.json

@@ -139,14 +139,6 @@
       "source_relative_path": "db/__init__.py",
       "target_relative_path": "src/gyxx_flow/modules/product_commerce/db/__init__.py"
     },
-    {
-      "category": "production_source",
-      "source_sha256": "fc19a57bcbc023ab20156820a708d64c5526fad33ef5eb5fdea56c0bb04b84e3",
-      "target_sha256": "2cbd79e4d984d556bac35a0aeb5b8f803309fd3fac2399da459cd61a3aa2484c",
-      "transformed": true,
-      "source_relative_path": "db/sync_dim_style.py",
-      "target_relative_path": "src/gyxx_flow/modules/product_commerce/db/sync_dim_style.py"
-    },
     {
       "category": "production_source",
       "source_sha256": "2dc00b88fb5f28c2db619074e97c4a7c446aec29926af9a6890065409c8fac0e",