Use denormalized.trees table to implement the routers under /species

[dadiorchen]

We are using public.trees to query data for /species but it is slow, we now created a new table to denormalize the data to get higher performance, so please use the new table to implement this API again.

Some notes:

• Prerequisite: Create schema and tables for denormalized data treetracker-denormalization#1
• Please checkout the denormalized branch to work on and to create pull request.
• More details about denormalization is here

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[aayushgauba]

@dadiorchen Please assign this to me. Thanks

[dadiorchen]

@aayushgauba I will unassign this from you, this issue is not able to start because of some roadblock