feat: implement specialty content module with expanded Page entity fields, database migrations, and data import utilities

sisvietnamvn_main/cleanup_and_categorize.py

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+import oracledb
+
+conn = oracledb.connect(user="sisvietnam", password="sisvietnam", dsn="localhost:1521/sisvietnam")
+cursor = conn.cursor()
+
+# === STEP 1: Clean up duplicates ===
+duplicates_to_delete = [
+    "tim-mach-2",
+    "phau-thuat-gay-me-hoi-suc-2",
+    "khoa-dinh-dung-tiet-che",
+    "khoa-than-kinh-dot-quy-2",
+]
+
+# Also delete from menu items first
+for slug in duplicates_to_delete:
+    cursor.execute("DELETE FROM sis_menu_item WHERE url = :1", [f"/chuyen-khoa/{slug}"])
+    cursor.execute("DELETE FROM sis_page WHERE slug = :1", [slug])
+    print(f"Deleted duplicate: {slug}")
+
+# Fix title for khoa-than-kinh-dot-quy (was "Khoa Thần kinh - Đột quỵ 2")
+cursor.execute("UPDATE sis_page SET title = N'Khoa Thần kinh - Đột quỵ' WHERE slug = 'khoa-than-kinh-dot-quy'")
+
+# Fix title for tim-mach
+cursor.execute("UPDATE sis_page SET title = N'Khoa Nội Tổng Hợp' WHERE slug = 'tim-mach'")
+
+conn.commit()
+
+# === STEP 2: Verify remaining specialties ===
+cursor.execute("SELECT slug, title FROM sis_page WHERE layout='SPECIALTY_DETAIL' ORDER BY title")
+rows = cursor.fetchall()
+print(f"\n=== Remaining specialties: {len(rows)} ===")
+for row in rows:
+    print(f"  {row[0]} | {row[1]}")
+
+conn.close()