docs(01-01): complete foundation plan with bug fix

Tasks completed: 3/3 + 1 bug fix
- Create main plugin file with bootstrap code
- Register Custom Post Type for form submissions
- Create admin menu structure
- Fix CPT registration hook timing (bug)

SUMMARY: .planning/phases/01-foundation/01-01-SUMMARY.md

.planning/phases/01-foundation/01-01-SUMMARY.md

@@ -65,6 +65,7 @@ Each task was committed atomically:
 1. **Task 1: Create main plugin file with bootstrap code** - `bdf02a2` (feat)
 2. **Task 2: Register Custom Post Type for form submissions** - `59acfae` (feat)
 3. **Task 3: Create admin menu structure** - `253129c` (feat)
+4. **Bug fix: CPT registration hook timing** - `e760eaa` (fix)
 
 ## Files Created/Modified
 
@@ -81,7 +82,21 @@ Each task was committed atomically:
 
 ## Deviations from Plan
 
-None - plan executed exactly as written.
+### Auto-fixed Issues
+
+**1. [Rule 1 - Bug] Fixed CPT registration hook timing**
+
+- **Found during:** Post-implementation verification (plugin activation)
+- **Issue:** CPT `init` hook was being added from within the parent `init` hook, so it never fired. The CPT would not register when plugin was activated.
+- **Fix:** Changed main plugin to call `register_post_type()` directly from the `init` method instead of relying on a nested hook. Removed redundant hook from CPT constructor.
+- **Files modified:** umzugsliste.php, includes/class-cpt.php
+- **Verification:** CPT now registers successfully - confirmed with `wp post-type list` and `post_type_exists()` check. Created test entry successfully.
+- **Commit:** e760eaa
+
+---
+
+**Total deviations:** 1 auto-fixed (bug), 0 deferred
+**Impact on plan:** Bug fix was necessary for correct operation. No scope creep.
 
 ## Issues Encountered