DO NOT MERGE: months = { from, to } closed table

[yyolk]

Look-later draft — do not merge. Parks an inclusive closed-table form for pressed months next to the existing int list.

[months]
from = 1
to = 12

or inline months = { from = 1, to = 3 }.

_parse_months expands the table to tuple[int, ...] at parse time. No new Spec type.

• omit / missing → full year 1..12
• months = [1, 2, 3] stays a literal member list (a 2-element list is not a span)
• month = N still maps to (N,)
• table: both from and to required ints, 1 <= from <= to <= 12, unknown keys fail (unknown months key …)
• no "1..12" strings, no step, no multi-span

examples/nomad.toml keeps the explicit list and notes the table equivalent in a comment.

  

[github-actions]

⚠️ Forced this pull request to draft because the title contains "DO NOT MERGE" has a "DO NOT MERGE" label.

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