Fixes cg connecting before parsing the --context flag

[jnmoyne]

Fixes the cg tool ignoring it's --context flag

[synadia-claude-reviewer]

Claude finished @jnmoyne's task in 1m 6s —— View job

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Review: cg --context flag fix

• Fetch PR diff and read pcgroups/cg/main.go
• Verify fisk/kingpin action-ordering semantics (parent command actions run before child/leaf actions)
• Check error handling and variable scoping changes
• Post review

Correctness: The root cause was real — natscontext.Connect(cg.natsContext) was called in main() before app.MustParseWithUsage(os.Args[1:]), so cg.natsContext was always still the zero value, silently ignoring --context. Moving the connect logic into connectAction and attaching it via .Action(cg.connectAction) on the static and elastic parent commands is the right fix: in fisk (kingpin-derived), action callbacks for a matched command path run in order from the outermost matched command to the leaf, so connectAction executes after all flags (including --context) are parsed but before the leaf command's own action (e.g. consumeStaticAction, promptStaticAction) runs. This also incidentally avoids attempting a NATS connection for --help/--version/usage-error invocations, which is a nice side benefit.

Error handling: Converting from log.Fatalf to returning wrapped errors (fmt.Errorf("...: %w", err)) from the action is an improvement — it lets fisk's usual error/usage reporting path handle failures instead of an abrupt os.Exit.

Minor scoping note (not a bug): err := <-cg.cgContext.Done() correctly switched from = to := since err is no longer declared earlier in main() — verified this compiles cleanly with the removed block.

No correctness, security, or performance issues found. The change is a straightforward, well-scoped fix.

[scottf]

LGTM

[piotrpio]

LGTM