[cli-consistency] Standardize e.g., punctuation across CLI help text

[Copilot]

CLI consistency checks found remaining help text outliers using e.g. instead of the project-standard e.g., in several command/flag descriptions. This PR aligns those strings across CLI and mirrored docs/MCP help surfaces.

• CLI help text normalization

  • Updated the affected help strings to use e.g., in:
    • deploy / update --cool-down usage text
    • env parent command long description
    • compile --schedule-seed flag usage
    • domains long description
    • checks long description

• Mirrored surface consistency

  • Updated the corresponding checks MCP tool description to keep wording consistent with CLI output.
  • Updated the CLI setup docs sentence for domains to match the same punctuation convention.

• Regression coverage

  • Added focused assertions in help-text consistency tests to enforce e.g., punctuation for the touched command surfaces.

const coolDownFlagUsage = "Cooldown period before applying a new release (e.g., 7d, 24h, 0 to disable). Does not apply to actions/* or github/* repositories"

[Copilot]

Pull request overview

Standardizes e.g., punctuation across user-facing CLI help text (and mirrored MCP/docs surfaces) to match the project’s help-text convention, and adds regression tests to prevent future drift.

Changes:

• Normalized multiple CLI help strings to use e.g., (cool-down usage, env/domains/checks long help, compile --schedule-seed usage).
• Updated mirrored surfaces (MCP tool description + setup docs) to match CLI wording.
• Added targeted help-text consistency assertions covering the touched command surfaces.

Show a summary per file

File	Description
pkg/cli/update_cooldown.go	Updates --cool-down usage text to e.g., punctuation.
pkg/cli/mcp_tools_readonly.go	Aligns MCP checks tool description punctuation with CLI help text.
pkg/cli/env_command.go	Normalizes env long help example punctuation to e.g.,.
pkg/cli/domains_command.go	Normalizes domains long help example punctuation to e.g.,.
pkg/cli/cli_consistency_help_test.go	Adds focused assertions to enforce e.g., on the touched CLI help surfaces.
pkg/cli/checks_command.go	Normalizes checks long help example punctuation to e.g.,.
docs/src/content/docs/setup/cli.md	Updates domains docs sentence to match CLI e.g., punctuation.
cmd/gh-aw/main.go	Normalizes compile --schedule-seed usage example punctuation to e.g.,.
cmd/gh-aw/main_help_text_test.go	Adds an assertion enforcing e.g., punctuation in --schedule-seed help text.

Copilot's findings

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• Files reviewed: 9/9 changed files
• Comments generated: 1