Add Track Changes architecture for draft revisions (CMP + CMPA)

Fixes critical bug in 1033-25: user-uploaded עריכה-*.docx files were
orphaned on disk while exports kept rebuilding from stale DB blocks.

New architecture:
- User-uploaded DOCX becomes the source of truth (cases.active_draft_path)
- System edits via XML surgery with real Word <w:ins>/<w:del> revisions
- User can Accept/Reject each change from within Word

Components:
- docx_reviser.py: XML surgery for Track Changes (15 tests)
- docx_retrofit.py: retroactive bookmark injection with Hebrew marker
  detection + heading heuristic (9 tests)
- docx_exporter.py: emits bookmarks around each of the 12 blocks
- 3 new MCP tools: apply_user_edit, list_bookmarks, revise_draft
- 4 new/updated endpoints: upload (auto-registers active draft),
  /exports/revise, /exports/bookmarks, /exports/{filename}/retrofit,
  /active-draft
- DB migration: cases.active_draft_path column
- UI: correct banner using real v-numbers, "מקור האמת" badge,
  detailed upload toast with bookmarks_added/missing_blocks
- agents: legal-exporter (3 export modes), legal-ceo (stage G for
  revision handling), legal-writer (revision mode)

Multi-tenancy:
- Works for both CMP (1xxx cases) and CMPA (8xxx/9xxx cases)
- New revise-draft skill added to both companies
- deploy-track-changes.sh syncs skills CMP ↔ CMPA
- retrofit_case.py: one-off retrofit of existing files

Tests: 34 passing (15 reviser + 9 retrofit + 4 exporter bookmarks + 6 e2e)

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

mcp-server/src/legal_mcp/server.py

@@ -321,6 +321,25 @@ async def export_docx(case_number: str, output_path: str = "") -> str:
     return await drafting.export_docx(case_number, output_path)
 
 
+@mcp.tool()
+async def apply_user_edit(case_number: str, edit_filename: str) -> str:
+    """רישום עריכה שהעלה המשתמש (עריכה-v*.docx) כמקור האמת החדש — מזריק bookmarks אם חסר."""
+    return await drafting.apply_user_edit(case_number, edit_filename)
+
+
+@mcp.tool()
+async def list_bookmarks(case_number: str) -> str:
+    """רשימת bookmarks הקיימים ב-active_draft של התיק (אנקורים ל-revisions)."""
+    return await drafting.list_bookmarks(case_number)
+
+
+@mcp.tool()
+async def revise_draft(case_number: str, revisions_json: str,
+                       author: str = "מערכת AI") -> str:
+    """החלת revisions (Track Changes) על ה-active_draft, יוצר טיוטה-v{N+1}.docx חדשה."""
+    return await drafting.revise_draft(case_number, revisions_json, author)
+
+
 @mcp.tool()
 async def analyze_style(appeal_subtype: str = "") -> str:
     """ניתוח סגנון על קורפוס ההחלטות של דפנה. מחלץ ושומר דפוסי כתיבה. סוג ערר: building_permit / betterment_levy / compensation_197 (ריק = הכל)."""