chore(memory-bank): record group C

- activeContext.md: the results of ai/defects-c and the next step.
- progress.md: group C is fixed on ai/defects-c (not merged yet).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: AI Assistant <ai@example.com>

.memory-bank/activeContext.md

@@ -48,8 +48,10 @@ the PRs, and tags `5.0.0-rc2` after the merges.
 - `ai/defects-b` fixes defects 14 to 17 (`-AppliesTo` is mandatory in the
   `Simple` sets; `-RemoveSpecific` is back): Windows PowerShell 331 passed,
   19 skipped; PowerShell 7 301 passed, 49 skipped (350 tests).
+- `ai/defects-c` fixes defects 18 to 21, the same missing `continue` in
+  `Remove-NTFSAudit`, and a stale hash in `Get-FileHash2`.
 
 ## Next step
 
-Group C (18 to 21) on `ai/defects-c`, then D, the E decisions, and the
-bugs from the issue triage (`ai/issue-fixes`).
+Group D (22 to 24) on `ai/defects-d`, then the E decisions and the bugs
+from the issue triage (`ai/issue-fixes`).

.memory-bank/progress.md

@@ -141,7 +141,7 @@ Numbered as agreed with the maintainer; each is documented on its page.
 - Review of group B: no Blocker or Major; three Minor findings fixed, the
   rest are listed in the PR description.
 
-#### C: Error handling
+#### C: Error handling (fixed on `ai/defects-c`, not merged)
 
 - (18) `Copy-Item2`, `Move-Item2`, `Remove-Item2`: one failing path skips
   the rest of `-Path` (`return` instead of `continue`).