Do not index issues that have a linked PR

[arkid15r]

Is your feature request related to a problem? Please describe.
Sometimes issues don't have an assignee but somebody still works on it and submits a PR (linked to the issue). Typically this means issue has already been taken care or.

Describe the solution you'd like

• Introduce a new flag has_pull_request for Issue model.
• Populate it during sync process based on GitHub API response issue pull_request field.
• Exclude issues with pull requests from indexing.

[AbhayTopno]

@arkid15r can you assign this to me please

[AbhayTopno]

@arkid15r If possible, could you elaborate a bit more on this issue?

[Rushhaabhhh]

Hi @arkid15r ,
I have experience with GitHub APIs and can resolve this issue quickly. Let me know if I can take it up!

[AbhayTopno]

I'm in the middle of solving this issue; if I get stuck, I'll let you know @Rushhaabhhh

[arkid15r]

@arkid15r If possible, could you elaborate a bit more on this issue?

I'm happy to answer any specific questions -- let me know. The description seems quite detailed though.

[harsh3dev]

@AbhayTopno Still working on it? Or is it open to contribute?

[arkid15r]

@harsh3dev @AbhayTopno this will be partially resolved w/ #845
After we have PRs data we can exclude issues linked to PRs.