Add SHOW RECEIVERS support

[Caideyipi]

Summary

• add tree-model SHOW RECEIVERS and table-model information_schema.receivers support
• track active pipe receiver sessions, sender endpoints, pipe IDs, handshake/transfer timestamps, and request counts
• wire DataNode/ConfigNode thrift and air-gap receiver runtime recording

Tests

• mvn "-Ddevelocity.off=true" -pl iotdb-core/node-commons -Dtest=PipeReceiverRuntimeRegistryTest test
• mvn "-Ddevelocity.off=true" -DskipTests compile -pl iotdb-core/antlr,iotdb-core/relational-grammar,iotdb-core/node-commons,iotdb-core/confignode
• mvn "-Ddevelocity.off=true" -DskipTests spotless:check -pl iotdb-core/node-commons,iotdb-core/datanode,iotdb-core/confignode,iotdb-core/relational-grammar,iotdb-core/antlr
• git diff --check

Notes

• DataNode focused compile is still blocked by unrelated generated Freemarker/calc symbols such as IFill, LinearFill, Accumulator, ComparatorChain, and IoTDBConfig.getModeMapSizeThreshold().
• ConfigNode receiver records proxied through DataNode use receiver_node_id = -1 because the current proxy path does not expose the exact target ConfigNode id.

[codecov]

Codecov Report

❌ Patch coverage is 59.04173% with 265 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.11%. Comparing base (283bce2) to head (15e8980).
⚠️ Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
...eceiver/protocol/thrift/IoTDBDataNodeReceiver.java	14.15%	97 Missing ⚠️
...b/queryengine/plan/planner/LogicalPlanBuilder.java	0.00%	24 Missing ⚠️
...iotdb/commons/pipe/receiver/IoTDBFileReceiver.java	59.18%	20 Missing ⚠️
...ipe/receiver/protocol/IoTDBConfigNodeReceiver.java	0.00%	18 Missing ⚠️
...db/db/queryengine/plan/analyze/AnalyzeVisitor.java	0.00%	18 Missing ⚠️
...ueryengine/plan/planner/OperatorTreeGenerator.java	0.00%	13 Missing ⚠️
...ecution/operator/source/ShowReceiversOperator.java	81.96%	11 Missing ⚠️
...an/planner/plan/node/source/ShowReceiversNode.java	54.54%	10 Missing ⚠️
...he/iotdb/commons/pipe/sink/protocol/IoTDBSink.java	30.00%	7 Missing ⚠️
...rotocol/thrift/async/IoTDBDataRegionAsyncSink.java	25.00%	6 Missing ⚠️
... and 18 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #17869      +/-   ##
============================================
+ Coverage     40.95%   41.11%   +0.16%     
  Complexity      318      318              
============================================
  Files          5248     5263      +15     
  Lines        364224   365606    +1382     
  Branches      47043    47236     +193     
============================================
+ Hits         149155   150316    +1161     
- Misses       215069   215290     +221     

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[sonarqubecloud]

Quality Gate failed

Failed conditions
B Reliability Rating on New Code (required ≥ A)

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