* fix(daemon): include tombstones in exportToJSONLWithStore for sync propagation
The daemon's exportToJSONLWithStore() function was using an empty
IssueFilter which defaults to IncludeTombstones: false. This caused
deleted issues (tombstones) to be excluded from JSONL exports during
daemon sync cycles.
Bug scenario:
1. User runs `bd delete <issue>` with daemon active
2. Database correctly marks issue as tombstone
3. Main .beads/issues.jsonl correctly shows status:"tombstone"
4. But sync branch worktree JSONL still showed status:"open"
5. Other clones would not see the deletion
The fix adds IncludeTombstones: true to match the behavior of
exportToJSONL() in sync.go, ensuring tombstones propagate to other
clones and prevent resurrection of deleted issues.
Adds regression test TestExportToJSONLWithStore_IncludesTombstones
that verifies tombstones are included in daemon JSONL exports.
* fix: resolve all golangci-lint errors (cherry-pick from fix/linting-errors)
Cherry-picked linting fixes to ensure CI passes.
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Co-authored-by: Charles P. Cross <cpdata@users.noreply.github.com>
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