OrganizationService was 552 lines, over the 500-line ceiling. The
80-line createOrganization routine — seed the org, the Board Chair,
identity/governance/operations/SDLC/policy defaults, starter channels,
the provider catalog — is a self-contained concern. Move it to
organization-seed.ts; the service now delegates and drops the two
service fields (operations, sdlc) only that routine used. Pure
relocation, behaviour identical: 469 lines, full suite and e2e green.