feat: 持久化资料包导出记录与列表摘要

apps/documents/migrations/0003_exporteddocument.py

@@ -0,0 +1,52 @@
+# Generated by Django 5.2.14 on 2026-06-04 18:20
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("documents", "0002_submissionbatch_uploadeddocument_chapter_code_and_more"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ExportedDocument",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("conversation_id", models.CharField(db_index=True, max_length=64)),
+                ("product_name", models.CharField(blank=True, db_index=True, max_length=255)),
+                ("template_name", models.CharField(blank=True, max_length=100)),
+                ("template_version", models.CharField(blank=True, max_length=50)),
+                ("export_mode", models.CharField(db_index=True, max_length=32)),
+                (
+                    "output_type",
+                    models.CharField(default="registration_word_export_report", max_length=100),
+                ),
+                ("file_name", models.CharField(max_length=255)),
+                ("relative_path", models.CharField(max_length=500)),
+                ("download_url", models.CharField(blank=True, max_length=500)),
+                ("created_at", models.DateTimeField(auto_now_add=True, db_index=True)),
+                (
+                    "batch",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="export_records",
+                        to="documents.submissionbatch",
+                    ),
+                ),
+            ],
+            options={
+                "ordering": ["-created_at"],
+            },
+        ),
+    ]