fix!: `ProjectGraph` are now completely stored in DB

[clementguillot]

• Fixes #118
• BREAKING CHANGE: add a Liquibase migration to null previous ProjectGraph (from Run collection). Liquibase requires a database different than admin w/ dbAdmin role!
• Update mongodb sub-chart values to add an init script to grant dbAdmin role to server user

[sonarcloud[bot]]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
86.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud