Register start handler also when config is invalid

[arturo-seijas]

The start handler is currently not registered when a charm is deployed without a proper configuration and this is fixed later

[amandahla]

LGTM!

[yanksyoon]

LGTM!

[github-actions]

Test coverage for 965ea07

Name                                    Stmts   Miss Branch BrPart  Cover   Missing
-----------------------------------------------------------------------------------
lib/charms/saml_integrator/v0/saml.py      89      0     16      0   100%
src/charm.py                               43      1      4      0    98%   60
src/charm_state.py                         35      0      6      0   100%
src/saml.py                                60      0     10      0   100%
-----------------------------------------------------------------------------------
TOTAL                                     227      1     36      0    99%

Static code analysis report

Run started:2023-08-16 14:11:22.513295

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 942
  Total lines skipped (#nosec): 5
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):