Fix time partition boundary overflows and splitter partition order

[Caideyipi]

Description

This patch fixes overflow-prone time partition boundary handling by making partition boundary calculations origin-aware and saturation-safe. It also preserves TsFile splitter output order for aligned chunks that are split across time partitions, which prevents Long.MAX_VALUE boundary chunks from being emitted in reverse partition order.

The main changes are:

• keep time partition origin/interval boundary state in TimePartitionUtils
• make partition start-time lookup and partition-start checks overflow-safe
• cap partition estimate calculations instead of overflowing
• use saturated arithmetic in TTL auto-clean partition boundary checks
• refresh partition boundary origin from storage engine configuration
• update related query and pipe realtime paths to use the shared boundary helper
• preserve aligned TsFile splitter partition emission order when decoded chunks are split across pages or time partitions

Tests

• mvn -pl iotdb-core/node-commons -DskipTests compile
• mvn -pl iotdb-core/node-commons test currently fails during testCompile because CommitProgressKeeperTest references missing RegionProgress, WriterId, and WriterProgress symbols, which is unrelated to this change.
• mvn -pl iotdb-core/datanode spotless:apply
• mvn -pl iotdb-core/datanode -am -Dtest=TsFileSplitterTest#testSplitTableTimeOnlyAlignedChunkAtLongMaxPartitionEnd,testSplitTableTimeOnlyAlignedChunkAtExactLongMaxUpperBound -Dsurefire.failIfNoSpecifiedTests=false -DfailIfNoTests=false test currently fails during datanode compile because generated ModeAccumulator sources reference missing org.apache.commons.collections4.comparators.ComparatorChain and IoTDBConfig#getModeMapSizeThreshold(), which is unrelated to this splitter change.

[codecov]

Codecov Report

❌ Patch coverage is 73.03704% with 182 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.36%. Comparing base (f971de2) to head (dacc9ca).

Files with missing lines	Patch %	Lines
.../udf/builtin/UDTFEqualSizeBucketOutlierSample.java	0.00%	36 Missing ⚠️
...yengine/plan/optimization/LimitOffsetPushDown.java	75.38%	16 Missing ⚠️
...unary/scalar/DateBinFunctionColumnTransformer.java	55.55%	12 Missing ⚠️
.../exception/query/QueryTimeoutRuntimeException.java	0.00%	10 Missing ⚠️
...e/iotdb/db/queryengine/plan/parser/ASTVisitor.java	54.54%	10 Missing ⚠️
.../iotdb/commons/udf/builtin/UDTFTimeDifference.java	0.00%	7 Missing ⚠️
...yengine/plan/relational/sql/parser/AstBuilder.java	0.00%	6 Missing ⚠️
...sformation/dag/intermediate/IntermediateLayer.java	0.00%	6 Missing ⚠️
...validate/TsFileOverlapValidationAndRepairTool.java	0.00%	6 Missing ⚠️
...relational/function/tvf/ForecastTableFunction.java	0.00%	5 Missing ⚠️
... and 29 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #17893      +/-   ##
============================================
+ Coverage     41.21%   41.36%   +0.14%     
  Complexity      318      318              
============================================
  Files          5258     5261       +3     
  Lines        366348   366677     +329     
  Branches      47389    47434      +45     
============================================
+ Hits         151004   151666     +662     
+ Misses       215344   215011     -333     

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[sonarqubecloud]

Quality Gate failed

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

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