fix(extractor): add regex fix for Hebrew law year gershayim corruption

תש[א-ת]+יי[א-ת] → תש[א-ת]+"[א-ת]  (e.g. תשכייה → תשכ"ה)

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

mcp-server/src/legal_mcp/services/extractor.py

@@ -118,6 +118,10 @@ _ABBREV_PATTERN = re.compile(
     '|'.join(re.escape(k) for k in sorted(_HEBREW_ABBREV_FIXES, key=len, reverse=True))
 )
 
+# Matches Hebrew law year abbreviations where gershayim was encoded as double-yod.
+# e.g. תשכייה → תשכ"ה,  תשנייב → תשנ"ב
+_HEBREW_YEAR_RE = re.compile(r'(תש[א-ת]+)יי([א-ת])')
+
 
 def _fix_hebrew_quotes(text: str) -> str:
     """Fix known Hebrew abbreviation quote replacements.
@@ -126,7 +130,9 @@ def _fix_hebrew_quotes(text: str) -> str:
     some born-digital PDFs encode gershayim (״) as double-yod (יי), producing
     the same corruption patterns as OCR.
     """
-    return _ABBREV_PATTERN.sub(lambda m: _HEBREW_ABBREV_FIXES[m.group()], text)
+    text = _ABBREV_PATTERN.sub(lambda m: _HEBREW_ABBREV_FIXES[m.group()], text)
+    text = _HEBREW_YEAR_RE.sub(r'\1"\2', text)
+    return text
 
 
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