fix(ownership): accept the register's new CONTROLLER_OR_AFFILIATE column

IDX's above-1% register as of 30 Oct 2026 (peng-2026-10-00029) inserts a
CONTROLLER_OR_AFFILIATE column after INVESTOR_CLASSIFICATION. The header
check rejected any column it did not know, so `ownership import` failed
with PARSEERROR and `releases`/`ticker` had nothing to show.

Accept that one column by name and skip it; any other unknown column is
still rejected, so the above-5% and investor-type workbooks stay out.
Storing the flag is a follow-up (ROADMAP).

The fixture is an 11-row excerpt of the real October workbook (disclaimer
rows, header, BBCA and ZYRX). The full file imports 7,149 rows across 961
tickers; live ownership smoke: 4 passed, 0 failed, no 403.

Claude-Session: https://claude.ai/code/session_01RqPPVeVDrnLoP7NUZmLRxY

ROADMAP.md

@@ -22,6 +22,12 @@ history lives in git.
   RSS per ticker, and IDX disclosures and exchange news through a
   maintainer-published feed
 
+## Ownership
+- Store the register's `CONTROLLER_OR_AFFILIATE` flag (from the 30 Oct 2026
+  report; about 1,200 controller and 950 affiliate rows) and show it in
+  `ticker`, `entity` and `changes`, so a controller's moves stand apart.
+  Needs a DB column, the snapshot format, and blank for older reports.
+
 ## Workflow
 - `watchlist`: named symbol sets usable by other commands
 - `alerts`: price alerts with a daemon