fix(link): deploy: mention dry run in logs

[swift1337]

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[greptile-apps]

Greptile Summary

Adds the deployment execution mode to each step runner’s structured logger so preview and real-execution records can be distinguished.

• Attaches dryRun=true to deployment preview logs.
• Attaches dryRun=false to actual execution logs.

Confidence Score: 5/5

The PR appears safe to merge with no actionable correctness, security, or quality issues identified.

The added structured attribute accurately reflects each RunSteps invocation, and every current caller supplies a valid logger without a conflicting dryRun attribute.

Important Files Changed

Filename	Overview
link/internal/deploy/steps.go	Derives a per-invocation logger carrying the dry-run mode before processing deployment steps; no actionable defect identified.

_{Reviews (1): Last reviewed commit: 635ec76 | Re-trigger Greptile}