fix(py): make junior '?' cell text sticky across exception overrides

Go's build_juniors sets cellText = "?" + countStr whenever
md.IsUnknown is true, regardless of whether an exception overrides the
expected amount. Python was checking expected == "?" for this branch,
but reconcile replaces expected with the exception amount (e.g. 0)
before the view builder runs, so the "?" was silently dropped to "-".

Fix: derive is_unknown from original_expected == "?" (set before
exception substitution) instead of expected == "?". Also align the
tooltip guard: Go only shows Received/Expected tooltip for non-unknown
months (or when paid > 0), matching the same is_unknown flag.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 2026-05-07 23:51 CEST — feat(py): M5.4 fix #2 — add vs and sync_id to payments tx projection
+
+- `scripts/match_payments.py`: `fetch_sheet_data` now reads `VS` and `Sync ID` columns and includes `vs`/`sync_id` keys in every tx dict. Previously only 9 columns were projected, causing `make parity` to report extra `vs`/`sync_id` fields on every raw payment row emitted by the Go backend. Values flow through `group_payments_by_person` → `_unwrap_view_model_for_api` to `raw_payments` (adults/juniors) and `grouped_payments` (payments) automatically.
+- `tests/test_app.py`: updated `/api/*` mock fixtures to include `vs`/`sync_id` keys for realism.
+- **Cache note**: after deploying, hit `POST /flush-cache` once so the in-process cache is cleared and the next request picks up the new column lookups.
+
 ## 2026-05-07 23:37 CEST — fix(go): accept single-digit day/month in attendance date headers
 
 - `go/internal/services/membership/sources.go`: `parseDates` now uses Go time formats `2.1.2006` and `1/2/2006` (single-digit reference forms, which accept both padded and unpadded inputs) instead of `02.01.2006` and `01/02/2006`. The Czech attendance sheet headers contain dates like `1.6.2026`, `23.3.2026`, `6.4.2026` — Go silently dropped those columns under the strict zero-padded format, while Python's `strptime("%d.%m.%Y")` accepted them. Effect was a missing `2026-06` month entirely on `/api/juniors` plus undercounted attendance for any month with single-digit columns; both surfaced as diffs in `make parity`.

scripts/match_payments.py

@@ -249,16 +249,31 @@ def fetch_sheet_data(spreadsheet_id: str, credentials_path: str) -> list[dict]:
         def get_val(idx):
             return row[idx] if idx != -1 and idx < len(row) else ""
 
+        def get_str(idx):
+            v = get_val(idx)
+            if isinstance(v, float) and v.is_integer():
+                return str(int(v))
+            return str(v)
+
+        def get_float(idx):
+            v = get_val(idx)
+            if isinstance(v, (int, float)):
+                return float(v)
+            try:
+                return float(str(v).strip())
+            except (ValueError, TypeError):
+                return 0.0
+
         tx = {
             "date": format_date(get_val(idx_date)),
-            "amount": get_val(idx_amount),
+            "amount": get_float(idx_amount),
             "manual_fix": get_val(idx_manual),
             "person": get_val(idx_person),
             "purpose": get_val(idx_purpose),
             "inferred_amount": get_val(idx_inferred_amount),
             "sender": get_val(idx_sender),
-            "vs": get_val(idx_vs),
-            "message": get_val(idx_message),
+            "vs": get_str(idx_vs),
+            "message": get_str(idx_message),
             "bank_id": get_val(idx_bank_id),
             "sync_id": get_val(idx_sync_id),
         }

scripts/views.py

@@ -310,8 +310,9 @@ def build_juniors_view_model(
             cell_text = "-"
             amount_to_pay = 0
 
-            if expected == "?" or (isinstance(expected, int) and expected > 0):
-                if expected == "?":
+            is_unknown = original_expected == "?"
+            if is_unknown or (isinstance(expected, int) and expected > 0):
+                if is_unknown:
                     status = "empty"
                     cell_text = f"?{count_str}"
                 elif paid >= expected:
@@ -339,7 +340,7 @@ def build_juniors_view_model(
                 status = "surplus"
                 cell_text = f"PAID {paid}"
 
-            if (isinstance(expected, int) and expected > 0) or paid > 0:
+            if (not is_unknown and isinstance(expected, int) and expected > 0) or paid > 0:
                 tooltip = f"Received: {paid}, Expected: {expected}"
             else:
                 tooltip = ""