Lock plan: macOS move, mdbtools extraction, resolve open decisions

Project moved Windows -> macOS, retiring the pyodbc + Access ODBC driver
extraction path in favor of mdbtools (verified against the real files).
Record the four now-locked decisions and the resolved utility_dbo blocker.

- PLAN.md: rework migration step 1 for mdbtools; replace "Open decisions"
  with locked Decisions (extraction=mdbtools, i18n=Spanish-first,
  CI=Gitea Actions, utility_dbo=available); update Status for the macOS
  move + portal DB in hand; finalize sync steps against real utility_dbo.
- RESUME.md: rewrite next-steps as a locked execution queue.
- migration/config.py: point SOURCE_ROOT at ~/Downloads/JorgeCuadros-Legacy.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

migration/config.py

@@ -8,13 +8,18 @@ templates, materialized Access query results) are excluded. Anything with
 real rows and an ambiguous purpose (e.g. PROPANO, datosfreak, pagos email)
 is loaded into staging anyway — the reconciliation pass decides what to do
 with it, per the migration plan's "don't guess the rule up front" principle.
-See C:\\Users\\ricar\\.claude\\plans\\logical-yawning-tome.md for the full
-rationale per table group.
+See PLAN.md (repo root) for the full rationale per table group.
+
+Environment note: this project moved from Windows to macOS. The original
+extraction path (pyodbc + the Windows Access ODBC driver in extract.py) does
+not work on macOS; extraction is being reworked to use mdbtools
+(`brew install mdbtools`). This SOURCE_ROOT points at the macOS location of
+the four Access source files.
 """
 
 from pathlib import Path
 
-SOURCE_ROOT = Path(r"C:\Users\ricar\Downloads\Jorge")
+SOURCE_ROOT = Path.home() / "Downloads" / "JorgeCuadros-Legacy"
 
 SOURCES = {
     "utilities": {