Release v1.10.3.
Update Cargo.lock.
Add some additional debugging output to the test container.
If a key is missing, infer the possible algorithms from the signature.
Update Sequoia-openpgp to 2.4 and policy-config to bring in PQC support
tests: Improve Dockerfile injecting rpm-sequoia to test container
Build sequoia in Fedora container
ci: Run ci also on pull requests
ci: Build package with features expected by Fedora