Object repair rebuilt missing data shards but left missing parity shards unrecreated. A parity-only repair could therefore complete without restoring the shard contents.
Add a repair-specific reconstruction path that regenerates parity after data shards are available, while keeping normal read decoding data-only. Also shut down repair writers after all blocks are written.
Constraint: Preserve read-path decode behavior and limit parity regeneration to repair.
Confidence: high
Scope-risk: moderate
Directive: Do not route read decoding through parity regeneration without measuring the cost.
Tested: cargo test -p rustfs-ecstore decode_data_and_parity -- --nocapture
Tested: cargo test -p rustfs-ecstore heal_reconstructs_missing_parity_shard -- --nocapture
Tested: cargo test -p rustfs-ecstore erasure_coding -- --nocapture
Tested: cargo test -p rustfs heal_object_marks_missing_shard_disk_dirty_for_capacity_manager -- --nocapture
Tested: cargo test -p rustfs-heal -- --nocapture
Tested: cargo clippy -p rustfs-ecstore --all-targets -- -D warnings
Tested: cargo fmt --all --check
Tested: make pre-commit
Not-tested: Live multi-node disk replacement outside local test harness
