fix(taps): align with integrator resilience patterns

Port critical patterns from the working integrator into Singer taps:
- GIAS: add 404 fallback to yesterday's date, increase timeout to 300s,
  use latin-1 encoding, use dated URL for links (static URL returns 500)
- FBIT: add GIAS date fallback, increase timeout, fix encoding to latin-1
- IDACI: use dated GIAS URL with fallback instead of undated static URL,
  fix encoding to latin-1, increase timeout to 300s
- Ofsted: try utf-8-sig then fall back to latin-1 encoding

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pipeline/plugins/extractors/tap-uk-ofsted/tap_uk_ofsted/tap.py

@@ -129,7 +129,11 @@ class OfstedInspectionsStream(Stream):
             df = pd.read_excel(io.BytesIO(resp.content), engine="odf", dtype=str)
         else:
             # Detect header row (may not be row 0)
-            text = resp.content.decode("utf-8-sig", errors="replace")
+            # Try utf-8-sig first, fall back to latin-1 (matches integrator)
+            try:
+                text = resp.content.decode("utf-8-sig")
+            except UnicodeDecodeError:
+                text = resp.content.decode("latin-1")
             lines = text.split("\n")
             header_idx = 0
             for i, line in enumerate(lines[:20]):