Pin bd (beads CLI) to v0.47.1 in CI workflows and fix test agent IDs
that trigger bd's isLikelyHash() prefix extraction logic.
Changes:
- Pin bd to v0.47.1 in ci.yml and integration.yml (v0.47.2 has routing
defaults that cause prefix mismatch errors)
- Fix TestCloseAndClearAgentBead_FieldClearing: change agent IDs from
`test-testrig-polecat-0` to `test-testrig-polecat-all_fields_populated`
- Fix TestCloseAndClearAgentBead_ReasonVariations: change agent IDs from
`test-testrig-polecat-reason0` to `test-testrig-polecat-empty_reason`
Root cause: bd v0.47.1's isLikelyHash() treats suffixes of 3-8 chars
(with digits for 4+ chars) as potential git hashes. Patterns like `-0`
(single digit) and `-reason0` (7 chars with digit) caused bd to extract
the wrong prefix from agent IDs.
Using test names as suffixes (e.g., `all_fields_populated`) avoids this
because they're all >8 characters and won't trigger hash detection.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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