feat: port applicable chain-dist restart logic from PR #271

[aledefra]

Summary

• ported still-applicable parts of closed PR feat: check all active jobs to restart jobs on down nodes #271 to current develop
• added active-job reconciliation in chain dist monitor (extra-node cleanup + missing-node restart-claim flow)
• extended delete_pipeline_from_nodes to accept target_nodes while preserving current API behavior

Scope

• extensions/business/chain_dist/chain_dist_monitor.py
• extensions/business/deeploy/deeploy_mixin.py

Verification

• python3 -m py_compile extensions/business/chain_dist/chain_dist_monitor.py extensions/business/deeploy/deeploy_mixin.py ✅
• python3 -m unittest extensions.business.deeploy.test_deeploy ❌ (environment: ModuleNotFoundError: No module named 'shapely')

Notes

• restart execution on missing nodes remains TODO in the original logic; this PR ports the same behavior without expanding scope.