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/unpack.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+"""Unpack and format XML contents of Office files (.docx, .pptx, .xlsx)"""
+
+import argparse
+import random
+import zipfile
+import defusedxml.minidom
+from pathlib import Path
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Unpack an Office file into a directory")
+    parser.add_argument("office_file", help="Office file (.docx/.pptx/.xlsx)")
+    parser.add_argument("output_dir", help="Output directory")
+    args = parser.parse_args()
+    unpack_document(args.office_file, args.output_dir)
+
+
+def unpack_document(input_file, output_dir):
+    """Unpack an Office file into a directory and pretty-print all XML files."""
+    output_path = Path(output_dir)
+    output_path.mkdir(parents=True, exist_ok=True)
+
+    with zipfile.ZipFile(input_file) as zf:
+        zf.extractall(output_path)
+
+    for pattern in ["*.xml", "*.rels"]:
+        for xml_file in output_path.rglob(pattern):
+            pretty_print_xml(xml_file)
+
+    # For .docx files, suggest an RSID for tracked changes
+    if str(input_file).endswith(".docx"):
+        suggested_rsid = "".join(random.choices("0123456789ABCDEF", k=8))
+        print(f"Suggested RSID for edit session: {suggested_rsid}")
+
+
+def pretty_print_xml(xml_file):
+    """Pretty-print a single XML file in place."""
+    content = xml_file.read_text(encoding="utf-8")
+    dom = defusedxml.minidom.parseString(content)
+    xml_file.write_bytes(dom.toprettyxml(indent="  ", encoding="ascii"))
+
+
+if __name__ == "__main__":
+    main()