feat: sharded notes refs for reduced push contention#818

Draft

svarlamov wants to merge 12 commits intomainfrom

feat/sharded-notes-refs

Commits on Mar 28, 2026

fix: fallback merge and retry loop for notes push on busy monorepos

svarlamov
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claude
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fix: fmt + add author identity to test git_plumbing helper for CI

svarlamov
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claude
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fix: handle Windows backslash paths in clone target directory derivation

svarlamov
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claude
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feat: sharded notes refs for reduced push contention on busy monorepos

svarlamov
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claude
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perf: optimize shard merge to minimize git process invocations

svarlamov
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claude
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fix: defensive guard in shard_for_commit for short SHA strings

svarlamov
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claude
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fix: collapse nested if to satisfy clippy collapsible_if

svarlamov
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claude
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fix: separate legacy and shard fetch calls to prevent mutual blocking

svarlamov
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claude
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fix: refresh sharded notes flag in daemon mode
svarlamov
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test: cover sharded notes default-off gating
svarlamov
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test: satisfy clippy for sharded notes coverage
svarlamov
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ci: retrigger CI after rebase onto updated base branch

svarlamov
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claude
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