Python, .NET: [Purview] Update CorrelationId

[Rishabh4275]

Motivation and Context

This change will help us identify the requests which come through agent framework and as a later part this should also help with debugging or if there are any issues from agent framework to Purview

Description

Adding @af to the ids to identify them.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/purview/agent_framework_purview
_middleware.py	112	0	100%
_processor.py	167	10	94%	173, 250–253, 258, 286, 288, 294, 296
_settings.py	37	0	100%
TOTAL	16609	2035	87%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3928	225 💤	0 ❌	0 🔥	1m 9s ⏱️

[Copilot]

Pull request overview

Updates the Purview integration to make correlation identifiers clearly attributable to Agent Framework traffic (via an @AF suffix) and to propagate a session/thread identifier through the Python middleware/processor so requests can be correlated to a conversation/thread when available.

Changes:

• Python: add session_id propagation into ScopedContentProcessor.process_messages() and derive correlation IDs as {session_or_guid}@AF.
• Python: middleware now extracts a session/conversation ID (thread ID / conversation_id) and passes it through pre- and post-checks; tests expanded accordingly.
• .NET: update Purview metadata models to require a correlationId parameter and append @AF; add PurviewSettings constructor validation for appName.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
python/packages/purview/agent_framework_purview/_processor.py	Adds session_id parameter and uses it to build correlation_id with @AF; uses settings app_version instead of hard-coded "1.0".
python/packages/purview/agent_framework_purview/_middleware.py	Extracts session ID from AgentContext/ChatContext and forwards it into prompt/response checks.
python/packages/purview/agent_framework_purview/_settings.py	Updates PurviewSettings docstring wording.
python/packages/purview/tests/test_processor.py	Updates assertions for new _map_messages(..., session_id, user_id) call shape.
python/packages/purview/tests/test_middleware.py	Updates mocks for new process_messages signature and adds coverage for session_id extraction from thread/messages.
python/packages/purview/tests/test_chat_middleware.py	Updates mocks for new process_messages signature and adds coverage for session_id extraction from options.
dotnet/src/Microsoft.Agents.AI.Purview/ScopedContentProcessor.cs	Appends @AF to correlation IDs and passes correlationId via constructor.
dotnet/src/Microsoft.Agents.AI.Purview/PurviewSettings.cs	Adds null/whitespace validation for appName.
dotnet/src/Microsoft.Agents.AI.Purview/Models/Common/ProcessContentMetadataBase.cs	Requires correlationId in ctor and makes CorrelationId non-nullable.
dotnet/src/Microsoft.Agents.AI.Purview/Models/Common/ProcessConversationMetadata.cs	Updates ctor to accept/pass correlationId.
dotnet/src/Microsoft.Agents.AI.Purview/Models/Common/ProcessFileMetadata.cs	Updates ctor to accept/pass correlationId.
dotnet/tests/Microsoft.Agents.AI.Purview.UnitTests/PurviewClientTests.cs	Updates test helper to use new ProcessConversationMetadata(..., correlationId) constructor.