feat: IMAP mail sync with thread-to-contact matching (PRD §6.1)

Real IMAP connection via imapflow library:
- Connects to IMAP server (IMAPFlow, TLS on port 993)
- Fetches recent messages (configurable limit, default 20)
- Extracts: from, fromEmail, subject, date, snippet (200 chars)
- Thread-to-contact matching (PRD §6.1):
  1. Match sender email against persons table
  2. If no person match, extract domain and match against company.website
  3. Returns matchedCompany + matchedPerson for each email
- Audit-logged (action: crm.mailsync:imap)
- Zod validated (host, port, user, password, folder, limit)
- 502 on IMAP connection failure with detail
- 400 on validation failure

Tested: invalid creds → 502 'IMAP connection failed', missing host → 400

skills/pptx/ooxml/scripts/validate.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+"""
+Command line tool to validate Office document XML files against XSD schemas and tracked changes.
+
+Usage:
+    python validate.py <dir> --original <original_file>
+"""
+
+import argparse
+import sys
+from pathlib import Path
+
+from validation import DOCXSchemaValidator, PPTXSchemaValidator, RedliningValidator
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Validate Office document XML files")
+    parser.add_argument(
+        "unpacked_dir",
+        help="Path to unpacked Office document directory",
+    )
+    parser.add_argument(
+        "--original",
+        required=True,
+        help="Path to original file (.docx/.pptx/.xlsx)",
+    )
+    parser.add_argument(
+        "-v",
+        "--verbose",
+        action="store_true",
+        help="Enable verbose output",
+    )
+    args = parser.parse_args()
+
+    # Validate paths
+    unpacked_dir = Path(args.unpacked_dir)
+    original_file = Path(args.original)
+    file_extension = original_file.suffix.lower()
+    if not unpacked_dir.is_dir():
+        sys.exit(f"Error: {unpacked_dir} is not a directory")
+    if not original_file.is_file():
+        sys.exit(f"Error: {original_file} is not a file")
+    if file_extension not in [".docx", ".pptx", ".xlsx"]:
+        sys.exit(f"Error: {original_file} must be a .docx, .pptx, or .xlsx file")
+
+    # Run validations
+    match file_extension:
+        case ".docx":
+            validators = [DOCXSchemaValidator, RedliningValidator]
+        case ".pptx":
+            validators = [PPTXSchemaValidator]
+        case _:
+            print(f"Error: Validation not supported for file type {file_extension}")
+            sys.exit(1)
+
+    # Run validators
+    success = True
+    for V in validators:
+        validator = V(unpacked_dir, original_file, verbose=args.verbose)
+        if not validator.validate():
+            success = False
+
+    if success:
+        print("All validations PASSED!")
+
+    sys.exit(0 if success else 1)
+
+
+if __name__ == "__main__":
+    main()