chore(ci): trim workflow comments and log messages

[henrypalacios]

Summary

• Reduce the comments in the workflow files to a plain statement of what each step does.
• Drop the header note block in both publish workflows; the jobs it described already document themselves.
• Reword the two fallback log messages in CI.yml so they report the step's exit status and nothing more.

Changes

File	Change
.github/workflows/CI.yml	Drop four comments above the test and audit steps; reword both fallback log messages
.github/workflows/publish-protocol-core.yaml	Drop the header note block
.github/workflows/publish-sdk.yaml	Drop the header note block

Behaviour

No functional change. Parsing both revisions of all three workflows yields identical structure and identical key sets. The only value differences anywhere are the two log message strings in CI.yml; the commands they follow are unchanged. Both publish workflows show zero parsed differences — every line removed there is a comment.

Step commands, continue-on-error declarations, triggers, permissions, conditions, needs:, environment:, concurrency:, job names and action pins are all untouched.

Net effect is 2 insertions and 18 deletions, every one of them a comment or a log message.

Test plan

• All three workflows parse as valid YAML
• Parsed key sets identical to main in all three files
• Only leaf value deltas are the two echo message strings in CI.yml; both publish workflows show zero parsed deltas
• Every added or removed line in the branch diff is a comment or an echo string