Enable Session Option to Stop Context Sharing

[n1harika]

This PR enables the session option: StopShareEpContexts ("ep.stop_share_ep_contexts" = 1/0), to explicitly clear the globally shared EP context after a session completes. This allows controlled cleanup of shared weights, metadata, its file path, and other cached artifacts stored in SharedContext.

For example, for model abc and model xyz:

model_abc(ep.share_ep_contexts=1, ep.stop_share_ep_contexts=1)
After this session, all existing shared context data is cleared.

model_xyz(ep.share_ep_contexts=1)
This model starts with a fresh shared context, without any leftover metadata or weights from model_abc.

[MayureshV1]

LGTM !

[MayureshV1]

@n1harika .. We can merge when you have a unit test ready for this.

[Copilot]

Pull Request Overview

This PR implements a new session option StopShareEpContexts for the OpenVINO execution provider that enables explicit cleanup of globally shared EP contexts after a session completes. This provides controlled cleanup of shared weights, metadata, and other cached artifacts.

• Adds a new session option so_stop_share_ep_contexts to control context cleanup behavior
• Implements cleanup logic in the SharedContext class with a clear() method
• Triggers context cleanup in the execution provider's Compile method when the option is enabled

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
openvino_provider_factory.cc	Parses the new StopShareEpContexts session option from configuration
openvino_execution_provider.cc	Adds shared context cleanup in destructor and compile method based on the new option
contexts.h	Defines the clear() methods for SharedContext and its nested structures

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[MayureshV1]

"delete mapped_weights.release();"
This might need a change as you are deleting a pointer you are releasing.

[Copilot]

Pull Request Overview

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

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[Copilot]

Pull Request Overview

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

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[MayureshV1]

Looks Good To Merge !