init: edu-content 内容库骨架（L1-L4 四层数据模型 + B类迁移 + lint/CI 工具）

schemas/qb-1.1.schema.json

@@ -0,0 +1,37 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "qb-1.1 question bank record",
+  "description": "题库记录。qb-1.0 向后兼容升级：新增 source.source_id（必填）与 source.source_item_id（可选）。",
+  "type": "object",
+  "required": ["schema", "id", "exam", "cefr", "paper", "part", "type", "items", "source", "license"],
+  "properties": {
+    "schema": { "const": "qb-1.1" },
+    "id": { "type": "string" },
+    "exam": { "type": "string", "enum": ["A2 Key", "A2 Key for Schools", "B1 Preliminary", "B1 Preliminary for Schools"] },
+    "cefr": { "type": "string", "enum": ["A2", "B1"] },
+    "paper": { "type": "string", "enum": ["reading_writing", "reading", "writing", "listening", "speaking", "vocabulary"] },
+    "part": { "type": ["integer", "null"] },
+    "type": { "type": "string", "enum": ["mcq", "matching", "open_cloze", "gap_fill", "word_formation", "writing_task", "speaking_prompt", "word_entry", "other"] },
+    "task_prompt": { "type": ["string", "null"] },
+    "title": { "type": ["string", "null"] },
+    "passage": { "type": ["string", "null"] },
+    "blank_token": { "type": "string" },
+    "items": { "type": "array", "items": { "type": "object" } },
+    "source": {
+      "type": "object",
+      "required": ["source_id"],
+      "properties": {
+        "source_id": { "type": "string", "pattern": "^[a-z0-9][a-z0-9-]*$" },
+        "source_item_id": { "type": ["string", "null"] },
+        "origin": { "type": "string" },
+        "file": { "type": ["string", "null"] },
+        "url": { "type": ["string", "null"] },
+        "retrieved": { "type": ["string", "null"] }
+      }
+    },
+    "license": { "type": "string", "enum": ["official-free", "cc-by", "cc-by-sa", "cc-nc-education", "restricted", "internal-only", "llm-generated", "unknown"] },
+    "tags": { "type": "array", "items": { "type": "string" } },
+    "note": { "type": ["string", "null"] },
+    "meta": { "type": ["object", "null"] }
+  }
+}