SONAR-22394 Add table ownership document (#11237)

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+## Purpose
+
+This document presents ownership of the tables in the Core database. This is intended
+to facilitate the understanding which squad is responsible for which data.
+
+Some tables have no ownership assigned yet, this is subject to change pending discussion between impacted squads.
+
+It is expected to edit this file if the ownership of a table changes. There is no automated process to validate it, at the
+same time we expect no frequent changes.
+
+Important read: [Data Ownership Principles](https://xtranet-sonarsource.atlassian.net/wiki/spaces/DEV/pages/3170795538/Data+Ownership+Principle)
+
+## Table Ownership
+
+| Table | Owning Squad |
+| --- | --- |
+| active_rule_parameters | Dev and Team Workflow Squad |
+| active_rules | Dev and Team Workflow Squad |
+| alm_pats | Integration Squad |
+| alm_settings | Integration Squad |
+| analysis_properties | Analysis Experience Squad |
+| anticipated_transitions |  |
+| app_branch_project_branch |  |
+| app_projects |  |
+| audits |  |
+| ce_activity | Analysis Experience Squad |
+| ce_queue | Analysis Experience Squad |
+| ce_scanner_context | Analysis Experience Squad |
+| ce_task_characteristics | Analysis Experience Squad |
+| ce_task_input | Analysis Experience Squad |
+| ce_task_message | Analysis Experience Squad |
+| components |  |
+| default_qprofiles |  |
+| deprecated_rule_keys |  |
+| duplications_index |  |
+| es_queue |  |
+| event_component_changes |  |
+| events |  |
+| external_groups |  |
+| file_sources | Analysis Experience Squad |
+| github_orgs_groups |  |
+| github_perms_mapping |  |
+| group_roles |  |
+| groups | Identity Squad |
+| groups_users | Identity Squad |
+| internal_component_props |  |
+| internal_properties |  |
+| issue_changes | Analysis Experience Squad |
+| issues | Analysis Experience Squad |
+| issues_fixed | Analysis Experience Squad |
+| issues_impacts | Analysis Experience Squad |
+| live_measures | Analysis Experience Squad |
+| metrics |  |
+| new_code_periods | Dev and Team Workflow Squad |
+| new_code_reference_issues |  |
+| notifications | Dev and Team Workflow Squad |
+| org_qprofiles | Dev and Team Workflow Squad |
+| perm_templates_groups |  |
+| perm_templates_users |  |
+| perm_tpl_characteristics |  |
+| permission_templates |  |
+| plugins |  |
+| portfolio_proj_branches | Enterprise Reporting and Hierarchy Squad |
+| portfolio_projects | Enterprise Reporting and Hierarchy Squad |
+| portfolio_references | Enterprise Reporting and Hierarchy Squad |
+| portfolios | Enterprise Reporting and Hierarchy Squad |
+| project_alm_settings | Integration Squad |
+| project_badge_token | Dev and Team Workflow Squad |
+| project_branches |  |
+| project_links | Dev and Team Workflow Squad |
+| project_measures |  |
+| project_qgates | Dev and Team Workflow Squad |
+| project_qprofiles | Dev and Team Workflow Squad |
+| projects |  |
+| properties |  |
+| push_events | Sonar Solution Squad |
+| qgate_group_permissions | Dev and Team Workflow Squad |
+| qgate_user_permissions | Dev and Team Workflow Squad |
+| qprofile_changes | Dev and Team Workflow Squad |
+| qprofile_edit_groups | Dev and Team Workflow Squad |
+| qprofile_edit_users | Dev and Team Workflow Squad |
+| quality_gate_conditions | Dev and Team Workflow Squad |
+| quality_gates | Dev and Team Workflow Squad |
+| report_schedules |  |
+| report_subscriptions |  |
+| rule_changes | Analysis Experience Squad |
+| rule_desc_sections | Analysis Experience Squad |
+| rule_impact_changes |  |
+| rule_repositories | Analysis Experience Squad |
+| rule_tags |  |
+| rules | Analysis Experience Squad |
+| rules_default_impacts |  |
+| rules_parameters |  |
+| rules_profiles | Dev and Team Workflow Squad |
+| saml_message_ids |  |
+| scanner_analysis_cache |  |
+| schema_migrations |  |
+| scim_groups |  |
+| scim_users |  |
+| scm_accounts |  |
+| session_tokens | Identity Squad |
+| snapshots | Analysis Experience Squad |
+| user_dismissed_messages | Dev and Team Workflow Squad |
+| user_roles |  |
+| user_tokens | Identity Squad |
+| users | Identity Squad |
+| webhook_deliveries | Dev and Team Workflow Squad |
+| webhooks | Dev and Team Workflow Squad |