Adds missing date range and priority filtering to bd search for feature
parity with bd list. Part of command standardization epic (bd-au0).
Changes:
- Add date range flags: --created-after/before, --updated-after/before,
--closed-after/before
- Add priority range flags: --priority-min, --priority-max
- Support multiple date formats (RFC3339, YYYY-MM-DD, etc.)
- Apply filters in both direct mode and daemon RPC mode
- Add comprehensive tests for new filters
Examples:
bd search "security" --priority-min 0 --priority-max 2
bd search "bug" --created-after 2025-01-01
bd search "refactor" --updated-after 2025-01-01 --priority-min 1
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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