Satisfy the attgo struct field order and comment capitalisation rules

[AntiD2ta]

Stacked on #420 (gloas-epbs-proposer), so this diff is the sweep alone. Retarget to gloas once #420 merges.

Pure style; no functional change. A full ./custom-gcl run goes from 108 findings to 12.

What changed

Rule	Before	After	Action
attgo_struct_field_order	85	0	Reordered 39 structs across 38 files
attgo_capital_comment	20	9	Capitalised the 11 that are ordinary prose
attgo_no_pkg_logger	3	3	Out of scope, see below

Copyright headers on the touched files were bumped, as attgo_current_year requires.

Why 12 remain

Nine attgo_capital_comment findings are left deliberately, because satisfying them would do harm:

• // skipcq: ... (3) and //revive:disable:nolint (3) are directives addressed to other tools. Capitalising them stops those tools recognising them, silently re-enabling whatever they suppress.
• // attest carries out... and // sign signs... document the unexported funcs attest and sign. A Go doc comment opens with the name of the thing it documents, so capitalising would assert an exported Attest/Sign that does not exist. The rule has an identifier exemption but it matches on a fixed list of following words, which carries and signs are not in.
• One is commented-out code.

The three attgo_no_pkg_logger findings (logging.go, services/metrics/prometheus, services/signer/standard) are a change to how vouch does logging rather than how it is formatted, so they are not folded into a formatting sweep.

Verification

• The field reordering is a pure permutation: for all 45 changed files, the multiset of source lines is unchanged apart from the copyright headers and the 11 capitalised comments. Checked mechanically, not by eye.
• go build ./... clean.
• gosilent test ./... 896 tests pass.
• Field ordering follows the linter's own categorisation (logger, metrics, dependency, data, synchronization), applied as a stable sort so relative order within a category is preserved.

Note

These findings all pre-date the Gloas work. Measured against origin/gloas, #420 introduces zero new lint findings and removes four.