Two named anti-patterns from the comment-budget issue, applied to the file
that carries the most comment lines in nix/host-modules.
The header re-explained the two-tier model and the co-location argument that
`docs/observability.md` already owns — "a boundary that disappears locally is
one the local deployment stops testing" appears in both, nearly word for word.
The doc is the right home for it; what stays here is the one fact the doc does
not carry, that this is a container because `services.opentelemetry-collector`
is a singleton option already taken by the hive tier.
The `logs_endpoint` block keeps every instruction and loses the narration:
use `logs_endpoint` not `endpoint`, both spellings pass `otelcol validate`
and every wrong path answers 400, `_msg_field` is required or text search
finds nothing while ingest still answers 200, `_stream_fields` sets stream
cardinality.
Six smaller trims of "measured"/"verified"/"once". One pointed at a probe
script under a single agent's state directory — a path no other reader can
open, in source every reader loads.
What stays: `validateConfigFile`'s "a parser, not a wiring check", the
`issuer_ca_path` warning, the swarm-tier stamp. Non-obvious, in no doc, and
the target is a share of the whole tree rather than a per-file quota.
604 comment lines to 574. Comment-only: the module still evaluates to the
same 36 module-eval properties.
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