refactor: use asyncpg instead of psycopg

[matthiasschaub]

Description

Goal is to remove one of the two database libraries in use.

No performance degregation detectable.

road-comparison w/ psycopg & w/out @alru_cache:

hurl --repeat 100 --test --variable BASE_URL="http://127.0.0.1:8080" road-comparison.hurl
[...]
Executed files:    100
Executed requests: 100 (1.6/s)
Succeeded files:   100 (100.0%)
Failed files:      0 (0.0%)
Duration:          61449 ms

road-comparison w/ asyncpg & w/out @alru_cache:

hurl --repeat 100 --test --variable BASE_URL="http://127.0.0.1:8080" road-comparison.hurl
--------------------------------------------------------------------------------
Executed files:    100
Executed requests: 100 (1.7/s)
Succeeded files:   100 (100.0%)
Failed files:      0 (0.0%)
Duration:          60572 ms

building-comparison w/ psycopg & w/out @alru_cache:

hurl --test --repeat 5 --variable BASE_URL="http://127.0.0.1:8000" building-comparison.hurl
--------------------------------------------------------------------------------
Executed files:    5
Executed requests: 5 (0.1/s)
Succeeded files:   5 (100.0%)
Failed files:      0 (0.0%)
Duration:          43198 ms

building-comparison w/ asyncpg & w/out @alru_cache:

hurl --test --repeat 5 --variable BASE_URL="http://127.0.0.1:8000" building-comparison.hurl
--------------------------------------------------------------------------------
Executed files:    5
Executed requests: 5 (0.1/s)
Succeeded files:   5 (100.0%)
Failed files:      0 (0.0%)
Duration:          43985 ms

Corresponding issue

Closes #746

New or changed dependencies

• None

TODO

• Add HURL tests

Checklist

• I have ensured my branch is mergeable with main (e.g. through git rebase main if necessary)
• My code follows the style guide and was checked with pre-commit before committing
• I have commented my code
• I have added sufficient unit and integration tests
• I have added new Hurl regression tests and checked all existing tests
• I have updated the CHANGELOG.md

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
22.2% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud