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/services/db.py

@@ -161,6 +161,11 @@ ALTER TABLE decisions ADD COLUMN IF NOT EXISTS outcome_reasoning TEXT DEFAULT ''
 ALTER TABLE cases ADD COLUMN IF NOT EXISTS appeal_type TEXT DEFAULT '';
 ALTER TABLE cases ADD COLUMN IF NOT EXISTS practice_area TEXT DEFAULT 'appeals_committee';
 ALTER TABLE cases ADD COLUMN IF NOT EXISTS appeal_subtype TEXT DEFAULT '';
+-- active_draft_path = path to the DOCX that is the current source of truth
+-- for this case's decision text. Set to the latest טיוטה-v*.docx after export,
+-- or the latest עריכה-v*.docx after user upload. Used by revise_draft to know
+-- what file to base Track Changes revisions on.
+ALTER TABLE cases ADD COLUMN IF NOT EXISTS active_draft_path TEXT;
 
 -- הרחבת style_corpus עם practice_area / appeal_subtype
 ALTER TABLE style_corpus ADD COLUMN IF NOT EXISTS practice_area TEXT DEFAULT 'appeals_committee';
@@ -520,6 +525,25 @@ async def get_case(case_id: UUID) -> dict | None:
     return _row_to_case(row)
 
 
+async def set_active_draft_path(case_id: UUID, path: str | None) -> None:
+    """Update the case's active_draft_path (the DOCX that is source of truth)."""
+    pool = await get_pool()
+    async with pool.acquire() as conn:
+        await conn.execute(
+            "UPDATE cases SET active_draft_path = $1, updated_at = now() WHERE id = $2",
+            path, case_id,
+        )
+
+
+async def get_active_draft_path(case_id: UUID) -> str | None:
+    pool = await get_pool()
+    async with pool.acquire() as conn:
+        row = await conn.fetchrow(
+            "SELECT active_draft_path FROM cases WHERE id = $1", case_id,
+        )
+    return row["active_draft_path"] if row else None
+
+
 async def get_case_by_number(case_number: str) -> dict | None:
     pool = await get_pool()
     async with pool.acquire() as conn: