Add Mypy check

[AndyRae]

Pull Request Contents

🦋 Bug Fix
🛠️ Repo maintenance

Description

Adds Mypy type checking to Github action code quality.

The codebase is currently not passing due to type problems, but this PR will help track that progress and issues.

Related Issues or other material

• This PR relates to one or more issues, detailed below

• Closes Type checking in CI #104

• I've completed all actions and tasks detailed in the PR Template

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
src/hutch_bunny
cli.py	34	3	91%	26, 32–33
daemon.py	18	18	0%	1–32
src/hutch_bunny/core
db.py	31	12	61%	27–32, 40–52, 71–73
db_manager.py	72	38	47%	35, 49, 60, 71, 87, 89, 91, 93, 95, 109, 121–126, 129–132, 163–182, 194–199, 208–211, 219
enums.py	8	1	88%	23
execute_query.py	27	13	52%	32–46, 57–62
results_modifiers.py	13	1	92%	42
settings.py	43	1	98%	83
src/hutch_bunny/core/rquest_dto
activity_job.py	12	12	0%	1–36
base_dto.py	6	2	67%	3, 7
cohort.py	14	1	93%	17
file.py	12	1	92%	24
group.py	14	1	93%	19
query.py	38	12	68%	32, 79, 102–116
rule.py	50	24	52%	28–31, 41–52, 85–101
src/hutch_bunny/core/solvers
availability_solver.py	180	35	81%	153, 210, 230, 325–330, 423–428, 435–475, 494–510, 524–525, 530
query_solvers.py	147	6	96%	36, 141, 252, 405–407
src/hutch_bunny/core/upstream
task_handler.py	9	9	0%	1–37
TOTAL	1008	190	81%

Tests	Skipped	Failures	Errors	Time
58	0 💤	0 ❌	0 🔥	28.438s ⏱️