feat(data): 财务/日线同步增量 + 新浪「两边一致」校验兜底 + 逐只进度

- financial 默认增量：按 A 股披露节奏判断已最新并跳过；--full 强制全量重拉
- Tushare fina_indicator 增加报告期窗口与 100 条/请求自动分页（修复老报告期静默截断）
- 新浪兜底收紧为校验兜底：两源重叠历史一致才导入缺失键，行标记 source=sina；
  财务可比字段取 eps/销售毛利率（ROE 两端口径不同不作依据），日线只比较最近重叠交易日
- CLI 输出逐只进度与导入内容描述（来源/行数/报告期与公告区间），失败股票留待重跑
- financial_indicator 增 source 列（迁移 d3f6c9a21b04）；新增一致性/分页/服务测试

backend/tests/test_tushare_provider.py

@@ -169,3 +169,58 @@ class TestRateLimitBackoff:
             ts_mod.time.sleep = orig_sleep
         assert len(provider._pro.calls) == 3  # noqa: SLF001 —— 完整重试 3 次
         assert len(sleeps) >= 2
+
+
+def _quarter_ends(count: int) -> list[str]:
+    """最近 count 个季度末（YYYYMMDD，降序）。"""
+
+    ends: list[str] = []
+    y, m = 2026, 6
+    while len(ends) < count:
+        ends.append(f"{y}{m:02d}30" if m in (6, 9) else f"{y}{m:02d}31")
+        m -= 3
+        if m <= 0:
+            m += 12
+            y -= 1
+    return ends
+
+
+class _FakeProQueue:
+    """按调用顺序弹出 payload 的 Fake pro（模拟分页）。"""
+
+    def __init__(self, payloads: list[list[dict]]) -> None:
+        self.payloads = list(payloads)
+        self.kwargs: list[dict] = []
+
+    def fina_indicator(self, **kwargs):
+        self.kwargs.append(kwargs)
+        return self.payloads.pop(0)
+
+
+class TestGetFinancialWindow:
+    def _record(self, end: str) -> dict:
+        return {"ts_code": "600519.SH", "end_date": end, "ann_date": end, "eps": "1.0"}
+
+    def test_window_args_passed(self) -> None:
+        ends = _quarter_ends(10)
+        fake = _FakeProQueue([[self._record(e) for e in ends]])
+        provider = TushareProvider(token="t", pro=fake)
+        rows = provider.get_financial("600519.SH", date(2024, 1, 1), date(2026, 6, 30))
+        assert len(rows) == 10
+        assert fake.kwargs[0]["start_date"] == "20240101"
+        assert fake.kwargs[0]["end_date"] == "20260630"
+
+    def test_paging_over_100_row_cap(self) -> None:
+        """单请求最多 100 条 → 超过必须回卷报告期窗口继续取，老数据不丢。"""
+        newest = _quarter_ends(100)
+        older = _quarter_ends(140)[100:]  # 100 条之外更早的 40 个季度
+        # 二次请求 end_date 必须早于首请求（分页回卷）
+        fake = _FakeProQueue(
+            [[self._record(e) for e in newest], [self._record(e) for e in older]]
+        )
+        provider = TushareProvider(token="t", pro=fake)
+        rows = provider.get_financial("600519.SH", date(2000, 1, 1), date(2026, 6, 30))
+        assert len(rows) == 100 + 40
+        assert len(fake.kwargs) == 2
+        assert fake.kwargs[1]["end_date"] < fake.kwargs[0]["end_date"]
+        assert {r.report_date for r in rows} == {date.fromisoformat(e[:4] + "-" + e[4:6] + "-" + e[6:]) for e in newest + older}