Fix cosmosdb vectorstore bug

[westey-m]

Motivation and Context

Description

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[Copilot]

Pull request overview

Updates the Azure Cosmos DB (NoSQL) vector store connector to build SQL filters using bound parameters for string constants, preventing SQL injection and fixing failures with apostrophes/backslash-escaped strings; adds regression coverage to validate the behavior.

Changes:

• Parameterize Cosmos NoSQL filter string literals (emit c.field = @filter_pN plus parameters) and renumber parameter names across multiple filters in _inner_search.
• Update and expand unit tests to assert parameter binding (including concurrency isolation and _inner_search query assertions).
• Add an integration regression test covering equality filters with apostrophes and injection-shaped payloads.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
python/semantic_kernel/connectors/azure_cosmos_db.py	Parameterizes filter string constants and renumbers filter parameters when composing multiple filters in Cosmos NoSQL queries.
python/tests/unit/connectors/memory/azure_cosmos_db/test_azure_cosmos_db_no_sql_collection.py	Updates unit tests for parameterized filters; adds concurrency and _inner_search parameterization coverage.
python/tests/integration/memory/azure_cosmos_db/test_azure_cosmos_db_no_sql.py	Adds an end-to-end regression test ensuring filtered searches behave correctly for apostrophes and injection payloads.

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[github-actions]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
connectors
azure_cosmos_db.py	423	128	69%	182, 199, 205–207, 317, 319, 394, 398, 414–417, 419–422, 424–425, 438–441, 444–446, 452–453, 455, 462–464, 468–470, 493–495, 501–503, 509–510, 512, 517, 534, 609, 626, 629–630, 638, 648–652, 709, 712–713, 750, 752, 765–766, 770–772, 786, 790, 826, 833, 835–839, 843, 855–856, 891–894, 902, 909, 916, 918, 921–930, 933–934, 936–943, 949, 963–966, 974, 978, 1002, 1030–1031, 1035–1040, 1132–1137
TOTAL	28967	5639	80%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
4074	23 💤	0 ❌	0 🔥	2m 20s ⏱️

[github-actions]

Automated Code Review

Reviewers: 5 | Confidence: 92% | Result: All clear

Reviewed: Correctness, Security Reliability, Test Coverage, Failure Modes, Design Approach

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Automated review by westey-m's agents