feat: season standing over the rounds of a division, checked against six more official races - #2

Summary

• Rulebook.Season ranks a division over its rounds. It adds the match points and the scores of all rounds, and the tie-breaks read the matches and groups of all rounds. Clubs are matched by name, so the caller gives a club one name for the whole season.
• Six more golden races: 1st and 2nd division Øst, round 1 and round 2; 1st, 2nd and 3rd division Nord, round 1 and round 2; and the DM Hold final with 6 clubs and 15 matches.
• The golden test now also checks the season standing at the top of each printout: every round's numbers, the totals and the tie-break comment. A round-2 race names round 1 with before. A scanned printout is a hand transcription of its summary pages, marked transcribed: true, without runner rows.

Evidence

go test -v -run Golden . agrees on all 14 divisions of the 7 races:

• every standing line and match score;
• every cell of the group-by-match grid;
• 1,241 more runner rows from the text printouts;
• every season line, including the tie-break comments such as 16 vs 14 first places in DM Hold and the mutual scores over two rounds in 3rd division Nord.

All runner names are generic. golangci-lint has 0 issues.

Merge Danger

Door: two-way. New API and test data; Compute is unchanged.
Blast Radius: small.