fix: startup panic if solana endpoint is not valid

[aalu1418]

Problem: node on startup will panic if endpoint is not valid and there are existing jobs

Cause:

• times are not initialized to zero:

  chainlink-solana/pkg/solana/contract.go

  Line 88 in 5b4d7cd

  ansTime: time.Now(),

• which allows the state + answer to be read because the time comparison will pass (even though the state has not been updated)

  chainlink-solana/pkg/solana/contract.go

  Line 172 in 5b4d7cd

  if time.Since(c.ansTime) > c.staleTimeout {

• then causes a panic when libocr tries using the data returned from LatestTransmission

Fix:

• initialize time to 0 which will throw an error for an uninitialized state (and will keep throwing an error to indicate an issue with polling and the endpoint)

Testing: ✅

• tested locally: start up network + nodes + feed => shut down a node => stop local network => start up the stopped node
  • previously would panic at this step
  • now shows error logs related to polling and failed to fetch state/data
  • => start up local network again => all nodes join again ✅