[CONTRACT] Add Multi-Hub Support in Subscription Contract

[truthixify]

Description:
Support multi-location subscriptions in subscription.rs.

Tasks:

• Add hub_id to Subscription struct.
• Modify functions to filter by hub.
• Test multi-hub scenarios.
• Use errors.rs for hub not found.

Acceptance Criteria:

• Subscriptions tied to hubs.
• Functions handle multi-hub.
• Tests pass.
• Compiles.

[Yunusabdul38]

can i work on this

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[truthixify]

It’s yours @Yunusabdul38

[yusuftomilola]

@Yunusabdul38 What is the update on this?? Its been 2 days now. You will be unassigned if it's not done soonest.

[Yunusabdul38]

@Yunusabdul38 What is the update on this?? Its been 2 days now. You will be unassigned if it's not done soonest.

GM will create a pr on this today
Before then, can you please explain this issue in detail

From the issue description, it says to add hub_id to the Subscription struct, but on the project there is no Subscription struct in it yet

If I am to implement the struct, I will need more info on how the struct should look and what it does
thanks

[Yunusabdul38]

I think my issue depends on #214

[Yunusabdul38]

@yusuftomilola, what is the update on the other issue

[truthixify]

@Yunusabdul38

That issue has been fixed, you can go on now.

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