style(waterdata): label the status line "Progress:" instead of "waterdata"

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: thodson-usgs

README.md

@@ -125,7 +125,7 @@ progress on a single, self-updating line on `stderr` — showing the chunk and
 page counts, rows retrieved so far, and the API requests remaining for the hour:
 
 ```text
-waterdata · chunk 2/5 · 14 pages · 8,421 rows · 4,870 requests left
+Progress: chunk 2/5 · 14 pages · 8,421 rows · 4,870 requests left
 ```
 
 The line appears automatically when `stderr` is an interactive terminal.

dataretrieval/waterdata/_progress.py

@@ -6,7 +6,7 @@
 and ``utils.get_stats_data``). This module surfaces that work as one line on
 stderr, rewritten in place as data arrives::
 
-    waterdata · chunk 2/5 · 14 pages · 8,421 rows · 4,870 requests left
+    Progress: chunk 2/5 · 14 pages · 8,421 rows · 4,870 requests left
 
 It replaces the per-page ``logger.info`` calls that previously narrated the same
 events one line at a time.
@@ -102,7 +102,7 @@ def set_rate_remaining(self, value: str | int | None) -> None:
             self.rate_remaining = str(value)
 
     def _format(self) -> str:
-        parts = ["waterdata"]
+        parts: list[str] = []
         if self.total_chunks > 1:
             parts.append(f"chunk {self.current_chunk}/{self.total_chunks}")
         parts.append(f"{self.pages} page" + ("" if self.pages == 1 else "s"))
@@ -114,7 +114,7 @@ def _format(self) -> str:
             rate = self.rate_remaining
             rate = f"{int(rate):,}" if rate.isdigit() else rate
             parts.append(f"{rate} requests left")
-        return " · ".join(parts)
+        return "Progress: " + " · ".join(parts)
 
     def _render(self) -> None:
         if not self.enabled or self._closed:

tests/waterdata_progress_test.py

@@ -48,6 +48,7 @@ def test_renders_pages_rows_and_rate_limit():
     reporter.set_rate_remaining("4870")
     reporter.add_page(rows=1234)
     out = stream.getvalue()
+    assert out.lstrip("\r").startswith("Progress: ")
     assert "1 page" in out
     assert "1,234 rows" in out
     assert "4,870 requests left" in out