fix: books with an asset linked to a since-reversed entry failed to open (the projection read-back re-checked the link against today's books); links restore as recorded, Ledger::acquisition_reversed reports ones to relink; regression test

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GWVo7x3UHw5kwCUaWxiejX

crates/ledger-store/src/store.rs

@@ -2981,7 +2981,7 @@ impl Store {
         let links = qstmt.query_map([], |r| Ok((r.get::<_, i64>(0)?, r.get::<_, i64>(1)?)))?;
         for row in links {
             let (id, entry) = row?;
-            ledger.set_asset_acquisition(id as u64, entry as u64)?;
+            ledger.restore_asset_acquisition(id as u64, entry as u64)?;
         }
         // Payroll runs: id order; lines in insertion order. Amounts are
         // TEXT in SQLite, so they parse here with exact Decimal math.