Return the encrypted id-graphs when it's updated

[Kailai-Wang]

Context

proposed by @kaylawangnow, we should return the full encrypted ID-graph when some identity is updated in the ID-graph, e.g. together with the IdentityVerified event.

It's mainly for display purposes.

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[jingleizhang]

needs:

- [ ] included in Parachain event, and encrypted by user_shielding_key
- [ ] to figure out which functionalities should include this feature, e.g, linking verification?

[Kailai-Wang]

I think link|unlink|verify_identity all can cause ID-graphs to change, thus all of them.

This is probably still meaningful even if the trusted port is exposed, where a user signature is required.

[jingleizhang]

related issue #1010

If we decided to open a trusted RPC port, it's not necessary to include the user's id-graph in Parachain event.

[Kailai-Wang]

related issue litentry/litentry-parachain#1010

If we decided to open a trusted RPC port, it's not necessary to include the user's id-graph in Parachain event.

A second thought leads me to believe it might still be helpful. A trusted query needs user to sign the request while here the id graph is directly returned - better user experience

[Kailai-Wang]

closed via #1080