build: upgrade base image & MongoDB; drop py3.8 #308

Job	Run time
Run linting and unit tests (3.9, 3.9-slim-bookworm, 4.4, 12345)	1m 6s
Run linting and unit tests (3.9, 3.9-slim-bookworm, 5.0, 12345)	1m 7s
Run linting and unit tests (3.9, 3.9-slim-bookworm, 6.0, 12345)	1m 12s
Run linting and unit tests (3.9, 3.9-slim-bookworm, 7.0, 12345)	1m 19s
Run linting and unit tests (3.10, 3.10-slim-bookworm, 4.4, 12345)	1m 20s
Run linting and unit tests (3.10, 3.10-slim-bookworm, 5.0, 12345)	1m 19s
Run linting and unit tests (3.10, 3.10-slim-bookworm, 6.0, 12345)	1m 21s
Run linting and unit tests (3.10, 3.10-slim-bookworm, 7.0, 12345)	1m 22s
Run linting and unit tests (3.11, 3.11-slim-bookworm, 4.4, 12345)	1m 19s
Run linting and unit tests (3.11, 3.11-slim-bookworm, 5.0, 12345)	1m 19s
Run linting and unit tests (3.11, 3.11-slim-bookworm, 6.0, 12345)	1m 20s
Run linting and unit tests (3.11, 3.11-slim-bookworm, 7.0, 12345)	1m 21s
Run linting and unit tests (3.12, 3.12-slim-bookworm, 4.4, 12345)	1m 3s
Run linting and unit tests (3.12, 3.12-slim-bookworm, 5.0, 12345)	1m 4s
Run linting and unit tests (3.12, 3.12-slim-bookworm, 6.0, 12345)	1m 4s
Run linting and unit tests (3.12, 3.12-slim-bookworm, 7.0, 12345)	1m 10s
Docker	0s
	19m 46s

Provide feedback