fix(examples): parse the live API's published timestamps on Python 3.8-3.10

The Search API sends `published` as "2026-09-30 05:04:18 +0000".
datetime.fromisoformat only accepts that on Python 3.11+, so on 3.8-3.10
the company news monitor's live mode stopped at the first real article with
"news item published must be an RFC 3339 timestamp". The checked-in fixtures
use RFC 3339 ("...Z"), so the tests never saw the live format.

Fall back to strptime("%Y-%m-%d %H:%M:%S %z") and test both formats.
Verified against the live API on Python 3.10: before, the error above;
after, 5 matching articles in the report.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: Autumn-Atlas

examples/company_news_monitor/monitor.py

@@ -56,13 +56,20 @@ def parse_args():
     return parser.parse_args()
 
 
+# The live API sends `published` as "2026-09-30 05:04:18 +0000".
+API_TIMESTAMP_FORMAT = "%Y-%m-%d %H:%M:%S %z"
+
+
 def parse_timestamp(value, label):
     if not isinstance(value, str) or not value:
         raise ValueError("{} must be a non-empty RFC 3339 timestamp".format(label))
     try:
         parsed = datetime.fromisoformat(value.replace("Z", "+00:00"))
-    except ValueError as exc:
-        raise ValueError("{} must be an RFC 3339 timestamp".format(label)) from exc
+    except ValueError:
+        try:
+            parsed = datetime.strptime(value, API_TIMESTAMP_FORMAT)
+        except ValueError as exc:
+            raise ValueError("{} must be an RFC 3339 timestamp".format(label)) from exc
     if parsed.tzinfo is None:
         raise ValueError("{} must include a timezone".format(label))
     return parsed.astimezone(timezone.utc)

tests/test_company_news_monitor_example.py

@@ -154,6 +154,25 @@ def test_date_boundaries_are_inclusive_and_outside_articles_are_removed():
     }
 
 
+@pytest.mark.parametrize(
+    "value",
+    ["2026-09-30 05:04:18 +0000", "2026-09-30 13:04:18 +0800", "2026-09-30T05:04:18Z"],
+)
+def test_parse_timestamp_accepts_live_api_published_format(value):
+    module = load_example_module()
+
+    parsed = module.parse_timestamp(value, "published")
+
+    assert parsed == datetime(2026, 9, 30, 5, 4, 18, tzinfo=timezone.utc)
+
+
+def test_parse_timestamp_still_rejects_values_without_timezone():
+    module = load_example_module()
+
+    with pytest.raises(ValueError):
+        module.parse_timestamp("2026-09-30 05:04:18", "published")
+
+
 def test_same_url_with_optional_id_drift_is_reported_once():
     module = load_example_module()
     start = datetime(2026, 8, 4, tzinfo=timezone.utc)