engine: Nil pointer panic in TestGetHistoricCandles

[gloriousCode]

New Issue

Context

2025-01-14T08:42:31.2617163Z --- FAIL: TestGetHistoricCandles (1.43s)
2025-01-14T08:42:31.2617846Z     rpcserver_test.go:916: cannot process trades in range 2019-11-30 01:00:00 +0000 UTC-2019-11-30 03:00:00 +0000 UTC as database is not connected
2025-01-14T08:42:31.2618001Z Database manager shutdown.
2025-01-14T08:42:31.2618143Z Database manager shutdown.
2025-01-14T08:42:31.2618536Z panic: runtime error: invalid memory address or nil pointer dereference [recovered]
2025-01-14T08:42:31.2618828Z 	panic: runtime error: invalid memory address or nil pointer dereference
2025-01-14T08:42:31.2619170Z [signal SIGSEGV: segmentation violation code=0x1 addr=0x78 pc=0x12f4404]
2025-01-14T08:42:31.2619181Z 
2025-01-14T08:42:31.2619320Z goroutine 522 [running]:
2025-01-14T08:42:31.2619523Z testing.tRunner.func1.2({0x1600f80, 0x2552710})
2025-01-14T08:42:31.2619715Z 	/usr/local/go/src/testing/testing.go:1632 +0x1bc
2025-01-14T08:42:31.2619858Z testing.tRunner.func1()
2025-01-14T08:42:31.2620056Z 	/usr/local/go/src/testing/testing.go:1635 +0x334
2025-01-14T08:42:31.2620193Z panic({0x1600f80?, 0x2552710?})
2025-01-14T08:42:31.2620384Z 	/usr/local/go/src/runtime/panic.go:785 +0x124
2025-01-14T08:42:31.2621023Z github.com/thrasher-corp/gocryptotrader/engine.TestGetHistoricCandles(0x40006d0000)
2025-01-14T08:42:31.2621198Z 	/app/engine/rpcserver_test.go:918 +0x1274
2025-01-14T08:42:31.2621360Z testing.tRunner(0x40006d0000, 0x1949378)
2025-01-14T08:42:31.2621541Z 	/usr/local/go/src/testing/testing.go:1690 +0xe4
2025-01-14T08:42:31.2621714Z created by testing.(*T).Run in goroutine 1
2025-01-14T08:42:31.2621900Z 	/usr/local/go/src/testing/testing.go:1743 +0x314

via this or this

• Operating System:
  GoCryptoTrader back-end (ubuntu-latest, arm64, false, true)

Expected Behavior

No panic

Current Behavior

Is panic

Steps to Reproduce

None yet, just highlighting the error which will hopefully reveal the bad assumption in the test