COBOL paragraph header whose separator period is on the next line is not a unit #3419

Found by the mainframe ground-truth ledger on CardDemo. Cause: header_period_next_line. The engine and the forge both have it, and so did the answer key's own draft reader until this PR fixed it.

Problem

app/app-transaction-type-db2/cbl/COTRTLIC.cbl has this header:

127400 2000-SEND-MAP
127500      .

It is a valid paragraph header: the separator period may follow on a later line. It is PERFORMed five times (PERFORM 2000-SEND-MAP THRU 2000-SEND-MAP-EXIT, lines 718–789). Neither the engine nor the forge makes it a unit, so:

• units misses 2000-SEND-MAP (engine and forge);
• the forge marks 2000-SEND-MAP-EXIT dead, because the start of its THRU range doesn't exist;
• the function-level call graph loses the unit.

It is the only instance across the three corpora, but it's a legal shape that hand-edited code produces.

Acceptance

• The engine | units and forge | units entries, and the forge dead false positive, stop reproducing.
• A fixture for a header whose period is on the next line.

🤖 Generated with Claude Code