List the Royal Colleges' fellowships and memberships as credentials - #1321

The first draft kept the undotted pair in the credential run wherever
every other word of the part was rules/C16's company, which also moved
a pair with company only in front ('John Smith, RA MJ', 'John Smith,
MA MJ'), one before a spelled-out generation or an agnomen ('MJ
Junior', 'MJ Filho') or a Title-case member ('MJ Ed'), and, under
CapsSuffixes.EVERYWHERE, a record written in capitals. Now at least
one credential must stand behind the pair, every other word must be a
credential its writing settles (no gated word, no Title-case member,
no title in front), and C6's contrast is asked under every setting.

Rows for each; rules/C5 names the generation-head and nickname moves;
decisions/C5 states the corpus recipe and the base SHA; decisions/S9
and C6 point at the narrowing; customize.rst's shared exception gains
the undotted case; nameparser/vocab/AGENTS.md records #1321's lesson.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…1323)

Behind two or more name words carrying rules/C6's case contrast, an
unlisted word of two capitals followed by credentials, and standing
beside nothing else, is the credential run rather than rules/C5's
undotted paired initials: 'Jane Doe, BM PhD' reads given 'Jane',
family 'Doe', suffix 'BM PhD'. A credential here is one its writing
settles: a generation, an agnomen, a word the count gates, a
Title-case member, a particle or a title in front of the pair is none,
and a word joined by a slash or a hyphen is asked chunk by chunk. The
lone pair, a one-word head, the dotted pair and an all-caps record keep
their readings.

Amends rules/C5 (its 'García Márquez, MJ PhD' boundary becomes the
stated accepted cost), with dated entries in decisions/C5 and S9,
pointers in decisions/C6, customize.rst's shared exception and
nameparser/vocab/AGENTS.md's lesson from #1321.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…1323) (#1338)

Behind two or more name words carrying rules/C6's case contrast, an
unlisted word of two capitals followed by credentials, and standing
beside nothing else, is the credential run rather than rules/C5's
undotted paired initials: 'Jane Doe, BM PhD' reads given 'Jane',
family 'Doe', suffix 'BM PhD'. A credential here is one its writing
settles: a generation, an agnomen, a word the count gates, a
Title-case member, a particle or a title in front of the pair is none,
and a word joined by a slash or a hyphen is asked chunk by chunk. The
lone pair, a one-word head, the dotted pair and an all-caps record keep
their readings.

Amends rules/C5 (its 'García Márquez, MJ PhD' boundary becomes the
stated accepted cost), with dated entries in decisions/C5 and S9,
pointers in decisions/C6, customize.rst's shared exception and
nameparser/vocab/AGENTS.md's lesson from #1321.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>