feat(graph): restore graph api

[ngjaying]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 42.59851% with 539 lines in your changes missing coverage. Please review.

Please upload report for BASE (master-v2@ed7bd5b). Learn more about missing BASE report.

Files	Patch %	Lines
internal/topo/planner/planner_graph.go	53.42%	218 Missing and 54 partials ⚠️
internal/server/rule_migration.go	0.00%	221 Missing ⚠️
internal/topo/planner/planner_sink.go	75.61%	14 Missing and 6 partials ⚠️
internal/topo/planner/ext_graph_node.go	6.67%	13 Missing and 1 partial ⚠️
internal/server/rule_manager.go	0.00%	5 Missing ⚠️
internal/topo/graph/io.go	83.33%	2 Missing and 3 partials ⚠️
internal/topo/planner/planner.go	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master-v2    #2979   +/-   ##
============================================
  Coverage             ?   68.06%           
============================================
  Files                ?      335           
  Lines                ?    32698           
  Branches             ?        0           
============================================
  Hits                 ?    22253           
  Misses               ?     8443           
  Partials             ?     2002           

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