Switch to cases/{new,in-progress,completed}/ directory structure

Replace single CASES_DIR with find_case_dir() that searches across
all status directories. New cases created in cases/new/{number}/.

Config: CASES_BASE, CASES_NEW, CASES_IN_PROGRESS, CASES_COMPLETED
Docker: added -v /home/chaim/legal-ai/cases:/cases volume mount

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

mcp-server/src/legal_mcp/tools/documents.py

@@ -39,7 +39,7 @@ async def document_upload(
         title = source.stem
 
     # Copy file to case directory
-    case_dir = config.CASES_DIR / case_number / "documents"
+    case_dir = config.find_case_dir(case_number) / "documents"
     case_dir.mkdir(parents=True, exist_ok=True)
     dest = case_dir / source.name
     shutil.copy2(str(source), str(dest))
@@ -68,7 +68,7 @@ async def document_upload(
             doc["doc_type"] = classified_type
 
     # Git commit
-    repo_dir = config.CASES_DIR / case_number
+    repo_dir = config.find_case_dir(case_number)
     if repo_dir.exists():
         subprocess.run(["git", "add", "."], cwd=repo_dir, capture_output=True)
         doc_type_hebrew = {