Investigate and enable azure-cosmos disabled tests

[kushagraThapar]

Disabled Tests in azure-cosmos-tests

Class-Level Disables (entire test class)

#	Test Class	Reason
1	VectorIndexTest (all tests)	Waiting for public emulator with vector index support to be released
2	FullTextIndexTest (all tests)	Waiting for public emulator with full-text search support to be released
3	HybridSearchQueryTest (all tests)	Waiting for public emulator to be released
4	MalformedResponseTests (all tests)	Must run in isolation — uses Reflection to override the ObjectMapper instance for deserialization; unsafe in parallel test runs

Method-Level Disables (individual tests)

#	Test Class	Test Method	Reason
5	CosmosConflictsTest	conflictCustomLWW	No reason given (@Ignore with no message)
6	SessionTest	partitionedSessionToken	TODO 32129 — flaky test, needs fix before re-enabling
7	AggregateQueryTests	queryDocumentsWithAggregates	TODO 32129 — flaky test, needs fix before re-enabling
8	GoneAndRetryPolicyWithSpyClientTest	createRecoversFrom410GoneClientGeneratedOnPartitionSplitDuringIdleTime	TODO 32129 — flaky test, needs fix before re-enabling
9	ChangeFeedTest	changeFeed_incrementalOnFullFidelityContainer_fromNow	Bug in emulator — always uses full-fidelity change feed on containers with retention
10	RequestHeadersSpyWireTest	readItemWithCacheBypass	Requires a SQLX endpoint to run (not available in standard test env)
11	JsonNodeStorePayloadTests	parsingBytesWithInvalidUT8Bytes	fallbackCharsetDecoder only initializes on first class load; no way to reload the class in-test

Summary by Category

• Waiting for emulator features: 3 classes (VectorIndex, FullText, HybridSearch)
• Flaky / TODO 32129: 3 tests (SessionTest, AggregateQuery, GoneAndRetry)
• Environment-specific: 2 tests (SQLX endpoint, isolation required)
• Technical limitation: 1 test (class reloading)
• Emulator bug: 1 test (ChangeFeed)
• No reason documented: 1 test (ConflictsTest)

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @kushagraThapar @pjohari-ms @TheovanKraay.