Stabilize more PPL ITs on the analytics-engine route (sort/streamstats/IP-UDT/metadata/strip-verifier)

[ahkcs]

Description

Brings 16 more PPL integration test classes to parity on the analytics-engine route (-Dtests.analytics.parquet_indices=true, which routes PPL through the parquet/composite store to DataFusion). Route-only divergences are skipped only when the analytics flag is on, via @RequiresCapability + a matching build.gradle excludeTestsMatching; the v2/Calcite path runs every test unchanged. Continues #5560 / #5561 / #5562 / #5564.

A key finding: several of the originally-reported "failures" were init-load contamination — a class loading a multi-value dataset (game_of_thrones, deep_nested, …) in init() throws at bulk load on the AE route, aborting init() and mislabeling whichever test ran first. Those are fixed (guarded loads), not gated.

Pass rate (this batch, on the analytics-engine route)

Class	Before	After
AnalyticsUnsupportedFieldStripVerifyIT	0/1 (guardrail)	1 pass / 0 fail
CalciteWhereCommandIT	30/32	32 pass / 0 fail
CalcitePPLSortIT	15/18	15 pass / 3 skip / 0 fail
CalciteReverseCommandIT	23/27	23 pass / 4 skip / 0 fail
CalcitePPLBuiltinDatetimeFunctionInvalidIT	43/45	43 pass / 2 skip / 0 fail
CalciteMathematicalFunctionIT	61/62	61 pass / 1 skip / 0 fail
CalcitePPLCastFunctionIT	20/21	20 pass / 1 skip / 0 fail
CalcitePPLAppendCommandIT	6/8	6 pass / 2 skip / 0 fail
CalcitePPLBuiltinFunctionsNullIT	70/71	70 pass / 1 skip / 0 fail
CalciteDedupCommandIT	3/4	3 pass / 1 skip / 0 fail
CalciteMultiValueStatsIT	29/31	29 pass / 2 skip / 0 fail
CalciteSortCommandIT	28/29	28 pass / 1 skip / 0 fail
SortCommandIT	23/24	23 pass / 1 skip / 0 fail
CalciteLikeQueryIT	9/10	9 pass / 1 skip / 0 fail
FieldsCommandIT	2/5	2 pass / 0 fail (3 excluded)

AE route: 16 classes, 373 run, 0 failures (was 24 failures).
V2 baseline: 408 run, 0 failures, 2 pre-existing/by-design skips (none from these gates).

Strip-verifier (the #5541 guardrail)

AnalyticsUnsupportedFieldStripVerifyIT was failing because 8 datasets carry a multi-value JSON array for a scalar-mapped field, which the parquet store rejects at bulk load. That's a cardinality limitation, not an unsupported type, so it's out of scope for the type strip — the same situation as the existing join out-of-scope skip. Added a curated MULTI_VALUE_DATASETS allowlist + safeToSkipForMultiValueLoad that skips only the exact multi-value signature on a known dataset; any other failure still surfaces loudly, and Legs 2-3 still type-check every index that loads.

Init-load contamination (fixed, not gated)

CalciteWhereCommandIT failed on testDoubleEqual* because init() loaded game_of_thrones (base) and deep_nested (subclass), both multi-value datasets whose bulk-load failure aborted init(). Guarded both with isAnalyticsParquetIndicesEnabled(); no test in the hierarchy queries them. 32/32 now pass.

Not divergences — handled without skipping result assertions

Where a test branched on isCalciteEnabled() for a type, the AE route runs the Calcite path but the cluster setting reads false — those were already addressed in #5564. This batch contains no test-expectation edits on dual-route classes.

New capabilities

SORT_TIE_ORDER_UNSTABLE, INVALID_DATETIME_ERROR_SHAPE, RAND_SEED_UNSUPPORTED, IP_UDT_BINARY_REPRESENTATION, TIME_TYPE_WIDENED_TO_TIMESTAMP, BINARY_FIELD_STRIPPED, VALUES_LIMIT_NOT_HONORED, INDEX_METADATA, CROSS_INDEX_OBJECT_LEAF_MERGE, TEXT_KEYWORD_PUSHDOWN_REWRITE, LUCENE_PUSHDOWN_EXPLAIN.

Reused capabilities

• WILDCARD_COLUMN_ORDER — streamstats carries all source columns through; AE returns them in a different order (4 tests)
• HEAD_WITHOUT_STABLE_SORT — head N without a stable sort (testHeadThenSort, testAppendWithMergedColumn)
• DEDUP_NONDETERMINISTIC — consecutive dedup has no working V2 fallback on the AE route

Out of scope

• FieldsCommandIT.testEnhancedFieldsWhenCalciteDisabled asserts the Calcite-disabled error, but the AE route is always Calcite-enabled — build.gradle exclude only.

Worth a real fix later (gated for now, flagged in capability docs)

• IP_UDT_BINARY_REPRESENTATION — the IP UDT is materialized as BINARY on the route (next UDT-on-parquet gap after the DATE/TIME UDT fix).
• VALUES_LIMIT_NOT_HONORED — PplAggregateCallRewriter emits no LIMIT for values()/list().

Check List

• New functionality includes testing.
• New functionality has been documented (in-source capability reasons).
• Commits are signed per the DCO using --signoff.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.