Make sure to setup discourse on database created event

[nrobinaubertin]

Overview

Make sure to setup discourse on database created event

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)

[github-actions]

Test coverage for b5197a7

Name              Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------
src/charm.py        322     31     82     11    90%   137, 171, 179-180, 336->341, 524-526, 531-532, 543-545, 550-551, 563-565, 570-571, 583-585, 610-612, 652->exit, 662->exit, 692-698, 724->exit, 738-739, 749->exit, 763
src/database.py      30      1      8      1    95%   56
-------------------------------------------------------------
TOTAL               352     32     90     12    90%

Static code analysis report

Run started:2023-12-01 15:44:12.300601

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 1913
  Total lines skipped (#nosec): 1
  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):