Add outcome-aware drafting, lessons system, and improved style analysis

- Add expected_outcome field to cases (rejection/partial/full/betterment_levy)
- New lessons.py module with golden ratios, templates, and drafting guidance per outcome type
- Style analyzer now uses Opus with full decision text (no truncation), with multi-pass fallback for large corpora
- Drafting tool provides outcome-specific templates, section guidance, and ratio comments
- Improved JSON extraction with bracket-matching fallback

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -129,10 +129,16 @@ CREATE INDEX IF NOT EXISTS idx_cases_number ON cases(case_number);
 """
 
 
+MIGRATIONS_SQL = """
+ALTER TABLE cases ADD COLUMN IF NOT EXISTS expected_outcome TEXT DEFAULT '';
+"""
+
+
 async def init_schema() -> None:
     pool = await get_pool()
     async with pool.acquire() as conn:
         await conn.execute(SCHEMA_SQL)
+        await conn.execute(MIGRATIONS_SQL)
     logger.info("Database schema initialized")
 
 
@@ -149,6 +155,7 @@ async def create_case(
     committee_type: str = "ועדה מקומית",
     hearing_date: date | None = None,
     notes: str = "",
+    expected_outcome: str = "",
 ) -> dict:
     pool = await get_pool()
     case_id = uuid4()
@@ -156,13 +163,13 @@ async def create_case(
         await conn.execute(
             """INSERT INTO cases (id, case_number, title, appellants, respondents,
                subject, property_address, permit_number, committee_type,
-               hearing_date, notes)
-               VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11)""",
+               hearing_date, notes, expected_outcome)
+               VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)""",
             case_id, case_number, title,
             json.dumps(appellants or []),
             json.dumps(respondents or []),
             subject, property_address, permit_number, committee_type,
-            hearing_date, notes,
+            hearing_date, notes, expected_outcome,
         )
     return await get_case(case_id)
 
@@ -438,3 +445,10 @@ async def upsert_style_pattern(
                 pattern_type, pattern_text, context,
                 json.dumps(examples or []),
             )
+
+
+async def clear_style_patterns() -> None:
+    """Delete all existing style patterns (used before re-analysis)."""
+    pool = await get_pool()
+    async with pool.acquire() as conn:
+        await conn.execute("DELETE FROM style_patterns")