Add prompt caching for contextual embeddings

[ArnavAgrawal03]

@claude please add prompt caching when we do contextual embeddings

[Satarupa22-SD]

Hi, is this issue open to new contributors?

[ArnavAgrawal03]

Yes!

[KUNDAN1334]

Hi @ArnavAgrawal03 , is this issue still open for contribution? If yes, I’d like to take it.