Leadership: cut MAX_FILINGS 30 -> 10 to spread the SEC backfill

@@ -84,11 +84,18 @@ const SEC_BUDGET: i64 = 600;/// Company-leadership refresh (Phase 14). Leadership changes slowly, so the/// roster is rebuilt monthly rather than on the weekly SEC cadence above. Each/// sweep parses at most this many of a company's most recent ownership filings/// (one HTTP request each): enough to capture the actively-filing officers and/// board on a first sweep, with later sweeps reading only the filings since,/// so the roster fills in and stays current at a small steady-state cost./// (one HTTP request each).////// At 10 filings per sweep, a first-time backfill of one company captures the/// recently-filing officers and board (a Form 3/4/5 from each active director/// + a handful of officer trades), while the steady-state monthly refresh is/// tiny — only the filings since `leadership_synced_at` are pulled. A higher/// chunk eagerly grabs more history but, multiplied by the few-hundred-stock/// universe, churned through the SEC endpoint's hourly budget during the/// Phase 14 backfill (markets-closed weekend burn). Smaller chunks spread/// that initial fill across more sweeps without changing the eventual roster.const LEADERSHIP_STALE_SECS: i64 = 30 * 24 * 3600;const LEADERSHIP_MAX_FILINGS: usize = 30;const LEADERSHIP_MAX_FILINGS: usize = 10;/// Dividend history refresh (Phase 26). Declared dividends are confirmed and/// stable once an ex-date passes, so the data changes slowly: a stock pays out