Revert #731's maiden-clause numeral fix; accept the shape in T4

[derek73]

Reverts #732 (6008c8c), which fixed #731.

Why. rules/T4 and maiden names don't really interact: nobody writes a maiden marker followed by an initial, or two. #731 made john smith nee x x and john smith nee j x read as their capitals at a real cost:

• a case argument on trailing_candidates and a whole-name case test in _maiden_take;
• a stated exception to trailing_candidates' superset contract;
• two grid shapes and a second invariant, each with its own control.

The gap #731 left open (a lowercase clause numeral behind capitals) would need the trailing peel to carry two case facts, one for S6's lean and one for the numeral. Neither is worth it for a shape names don't take.

What changes.

• Code and tests match ad486f6 again. The diff against that commit is Extend the ZH surname list past the census top 100 (#695, #657) #730's alone.
• john smith nee x x reads suffix x, maiden x, as 2.2.0 through 2.4.2 read it. rules/T4 states this as an Accepted clause, with both spellings as executable examples.
• Should john smith nee x x read like JOHN SMITH NEE X X? A shape-only numeral in a maiden clause #731 comes off the Should j nee smith read like J NEE SMITH? A lowercase single letter isn't an initial in a one-case name #723 release bullet.
• decisions/T4 and decisions/M2 keep their Should john smith nee x x read like JOHN SMITH NEE X X? A shape-only numeral in a maiden clause #731 entries (append-only) and gain superseding entries recording the decision.

Kept from #732. rules/M2 names S10 among the trailing rules its take asks. That was true before #731, since the fork that reads a shape-only numeral is S10's.

Not touched. classify still reads a clause's letter by the whole name's case (#723's review). That guards a shape names do take: a connective inside a clause, MARIA GARCIA NEE LOPEZ y FERNANDEZ.

Full suite, mypy and ruff pass; the snapshot gains only the two Accepted examples.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.04%. Comparing base (6008c8c) to head (b8e5d63).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #733   +/-   ##
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  Coverage   99.04%   99.04%           
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  Files          46       46           
  Lines        4589     4589           
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  Hits         4545     4545           
  Misses         44       44           

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