Introduce tenant-scoped Space/SpaceMembership with list and detail views.
Document markdown-in-Forgejo as content SoR (ADR-0002). Run migrations on
container start so app.coulomb.social picks up the new tables.
Post-login lands on Spaces empty state instead of a principal dump.
Profile menu exposes Session details with identity, tenant, roles/groups,
and authz diagnostics for operator refinement (CSOC-WP-0004 T01/T07).
Mark CSOC-WP-0002 identity done on app.coulomb.social. Defer bulk Bubble
migration until product foundation exists. Open CSOC-WP-0004 for post-login
entry and space content as markdown bound to Forgejo.
