chore: normalize line endings to LF via .gitattributes

Root-cause fix for mixed CRLF/LF in the repo (no .gitattributes previously).
Adds '* text=auto eol=lf' and explicit binary rules so all future checkouts
are LF. Renormalizes all tracked text files (no logical content change).
Backup tags: image qihuaiflow:backup-lineend-20260725-121632, git backup-lineend-pre-20260725-121632.

migrations/018_normalize_marketapp_scene.sql

@@ -1,20 +1,20 @@
--- 018: 将 market_apps.capability 从旧的「AI 技术能力」取值规范为「业务场景」取值
--- 旧的 text/thinking/vision/tool/image/audio/asr/ocr/embedding/rerank/video 已不再使用，
--- 统一置空，后续由 AI 验证 / 导入阶段按业务场景重新归类。
--- 幂等：执行一次后不再有匹配行，可安全每次重启重跑。
--- 注意：当前业务场景标准 = 前台「应用市场」14 类 (MARKET_SCENES)：
---   design, frontend, mobile, backend, qa, search, docs, marketing,
---   workflow, secops, learning, video, collab, ai
--- 这些为合法取值，必须保留，不得置空（#707 修复：此前 allowlist 不含 14 类导致重启被清空）。
-UPDATE market_apps
-SET capability = NULL
-WHERE capability IS NOT NULL
-  AND capability NOT IN (
-    'design', 'frontend', 'mobile', 'backend', 'qa', 'search', 'docs', 'marketing',
-    'workflow', 'secops', 'learning', 'video', 'collab', 'ai',
-    'freelance_content', 'freelance_client', 'freelance_finance',
-    'office_doc', 'office_data', 'office_email', 'office_pm',
-    'edu_prepare', 'edu_grade', 'edu_tutor', 'edu_home',
-    'biz_product', 'biz_service', 'biz_ops',
-    'general_write', 'general_research', 'general_agent'
-  );
+-- 018: 将 market_apps.capability 从旧的「AI 技术能力」取值规范为「业务场景」取值
+-- 旧的 text/thinking/vision/tool/image/audio/asr/ocr/embedding/rerank/video 已不再使用，
+-- 统一置空，后续由 AI 验证 / 导入阶段按业务场景重新归类。
+-- 幂等：执行一次后不再有匹配行，可安全每次重启重跑。
+-- 注意：当前业务场景标准 = 前台「应用市场」14 类 (MARKET_SCENES)：
+--   design, frontend, mobile, backend, qa, search, docs, marketing,
+--   workflow, secops, learning, video, collab, ai
+-- 这些为合法取值，必须保留，不得置空（#707 修复：此前 allowlist 不含 14 类导致重启被清空）。
+UPDATE market_apps
+SET capability = NULL
+WHERE capability IS NOT NULL
+  AND capability NOT IN (
+    'design', 'frontend', 'mobile', 'backend', 'qa', 'search', 'docs', 'marketing',
+    'workflow', 'secops', 'learning', 'video', 'collab', 'ai',
+    'freelance_content', 'freelance_client', 'freelance_finance',
+    'office_doc', 'office_data', 'office_email', 'office_pm',
+    'edu_prepare', 'edu_grade', 'edu_tutor', 'edu_home',
+    'biz_product', 'biz_service', 'biz_ops',
+    'general_write', 'general_research', 'general_agent'
+  );

migrations/021_create_conversation_summaries.sql

@@ -1,7 +1,7 @@
-CREATE TABLE IF NOT EXISTS conversation_summaries (
-  conversation_id VARCHAR(64) NOT NULL,
-  summary_text TEXT NULL,
-  token_count INT NULL DEFAULT 0,
-  updated_at DATETIME(3) NULL,
-  PRIMARY KEY (conversation_id)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+CREATE TABLE IF NOT EXISTS conversation_summaries (
+  conversation_id VARCHAR(64) NOT NULL,
+  summary_text TEXT NULL,
+  token_count INT NULL DEFAULT 0,
+  updated_at DATETIME(3) NULL,
+  PRIMARY KEY (conversation_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;