getTrackedIssues was spawning a separate bd show subprocess for each
tracked issue. With 10 convoys x 5 issues = 50+ subprocesses per poll.
Solution: Use bd show batch capability (bd show id1 id2 id3 --json)
to fetch all issue details in a single call. Falls back to individual
lookups if the batch fails (e.g., invalid IDs).
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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