fix(pii): remove real member names tied to payments

- Scrub three parity fixtures that still held raw bank messages
- Use fictional names in the junior regression test, its changelog
  entry and its plan file
- State the rule in CLAUDE.md: a real name as a bare test input is
  fine; a real name next to payment details, or any junior or parent
  name, is not
- Tick T4 in the cleanup task list

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/plans/2026-05-06-1626-infer-payments-junior-roster.md

@@ -2,12 +2,12 @@
 
 ## Context
 
-A bank payment from sender `JIŘÍ KUBÍK` with the message
-`Jáchym Kubík: 01/2026+03/2026+04/2026` is being inferred as
-`[?] Jáchym Hrušák (G)` instead of the obvious `Jáchym Kubík`, even though
+A bank payment from sender `JIŘÍ DVOŘÁK` with the message
+`Jáchym Dvořák: 01/2026+03/2026+04/2026` is being inferred as
+`[?] Jáchym Novotný (G)` instead of the obvious `Jáchym Dvořák`, even though
 the message contains his exact full name.
 
-**Root cause** (confirmed with the user): `Jáchym Kubík` is in the **junior**
+**Root cause** (confirmed with the user): `Jáchym Dvořák` is in the **junior**
 attendance sheet only — he does not appear on the main/adults sheet. But
 [scripts/infer_payments.py:101-102](scripts/infer_payments.py#L101-L102)
 builds `member_names` by calling `get_members_with_fees()`
@@ -15,17 +15,17 @@ builds `member_names` by calling `get_members_with_fees()`
 `EXPORT_URL` (the adults sheet). Junior-only members are therefore invisible
 to the matcher.
 
-With Kubík absent from `member_names`, the matcher in
+With Dvořák absent from `member_names`, the matcher in
 [scripts/match_payments.py:65](scripts/match_payments.py#L65) processes the
-combined text `jiri kubik jachym kubik: 01/2026+03/2026+04/2026` against an
+combined text `jiri dvorak jachym dvorak: 01/2026+03/2026+04/2026` against an
 adults-only roster:
 
 - The exact-full-name short-circuit (`match_payments.py:75-84`) finds nothing —
   no adult's full name is in the text.
-- Hrušák `(G)` is the only adult with first name `Jáchym`. He fails the
+- Novotný `(G)` is the only adult with first name `Jáchym`. He fails the
   auto-rules (his surname isn't in the text) but hits the partial-first-name
-  review rule (`match_payments.py:123-125`) → returned as `("Jáchym Hrušák (G)",
-  "review")`, rendered as `[?] Jáchym Hrušák (G)`.
+  review rule (`match_payments.py:123-125`) → returned as `("Jáchym Novotný (G)",
+  "review")`, rendered as `[?] Jáchym Novotný (G)`.
 
 The user's original framing — "exact match in message should win over
 everything" — is already implemented for any candidate that **is** in the
@@ -33,7 +33,7 @@ roster (the May-04 short-circuit). The bug is upstream: the right candidate
 was never even considered.
 
 **Goal:** make `infer_payments` consider junior members as candidates, so
-junior-only names like `Jáchym Kubík` get matched correctly.
+junior-only names like `Jáchym Dvořák` get matched correctly.
 
 ## Approach
 
@@ -98,23 +98,23 @@ changes are needed.
   the adults version, so `m[0]` works for both.
 - [scripts/match_payments.py:65-137](scripts/match_payments.py#L65-L137) —
   `match_members` already handles the precedence the user wants (exact full-name
-  short-circuit), so once Kubík is in `member_names`, the case will be auto-matched
+  short-circuit), so once Dvořák is in `member_names`, the case will be auto-matched
   with no `[?]`.
 
 ## Verification
 
 1. **Manual sanity** — re-run inference on the offending row:
-   - Clear `Person`/`Purpose` for the Kubík row in the payments sheet.
+   - Clear `Person`/`Purpose` for the Dvořák row in the payments sheet.
    - `make infer`.
-   - Expect `Person = Jáchym Kubík`, `Purpose = 2026-01, 2026-03, 2026-04`,
+   - Expect `Person = Jáchym Dvořák`, `Purpose = 2026-01, 2026-03, 2026-04`,
      no `[?]`.
 
 2. **Unit test** — extend
    [tests/test_match_members.py](tests/test_match_members.py) (or add a small
    `tests/test_infer_payments.py`) to assert that, given a roster that
-   includes `Jáchym Hrušák (G)` and `Jáchym Kubík`, the message
-   `Jáchym Kubík: 01/2026+03/2026+04/2026` resolves to
-   `[("Jáchym Kubík", "auto")]` only. This is really a regression test for
+   includes `Jáchym Novotný (G)` and `Jáchym Dvořák`, the message
+   `Jáchym Dvořák: 01/2026+03/2026+04/2026` resolves to
+   `[("Jáchym Dvořák", "auto")]` only. This is really a regression test for
    the May-04 short-circuit — the new behavior under test is just that
    `infer_payments` now feeds in juniors.
 
@@ -122,7 +122,7 @@ changes are needed.
 
 4. **Dashboard smoke** — `make web`, open `/payments`, confirm the row now
    shows the correct member; open `/juniors`, confirm the payment is
-   credited to Kubík for the three months listed.
+   credited to Dvořák for the three months listed.
 
 5. **Changelog** — once the user confirms the fix, append an entry to
    [CHANGELOG.md](CHANGELOG.md) per [CLAUDE.md](CLAUDE.md):