Update automation

Per-day creator-outreach caps + run window. Stored into Automations.schedule JSONB. Same shape as the existing portal payload — keeps the portal and Public API agreeing on schema.

Outreach-paradigm recipient inclusion. Three mutually-exclusive modes (cf. INTERNAL-design-review.md §11A):

• lists mode — list_upload and/or lists_selected populated
• filters mode — filters populated (dynamic by attribute)
• crm_group mode — crm_group_id populated (saved predicate)

The validator below rejects any request that mixes modes. The creator_source_type discriminator written to config is derived from which mode is set — callers don't need to set it explicitly.

Outreach-paradigm recipient exclusion. Mirrors creators_to_omit in the legacy DB column / frontend payload, plus the boolean exclude_previously_messaged flag from the portal's Exclude Creators panel.

Replace the initial-outreach addon set. ALL items are sent immediately together when the automation engages a creator. Pass [] to clear messages (invite-only). Use follow_ups for delayed sequencing. Only valid for target_collab and dm automations.

Replace the delayed follow-up sequence. Pass [] to clear. Only valid for target_collab and dm automations.

All-Optional companion to TargetCollabConfig for PATCH bodies. extra="forbid" rejects typos so a PATCH like {invitatoin_name: "..."} returns 422 instead of silently no-op'ing.

All-Optional companion to DmConfig for PATCH bodies.

All-Optional companion to SampleRequestPayload for PATCH bodies. Reuses the create-time nested types (SampleRequestProducts, SampleRequestPerformanceCriteria, SampleRequestAutoApprovalSettings) which already have extra="forbid".

Canonical write-endpoint response. Replaces the v1 AutomationResource (which mirrored the legacy single-shape body). Now reflects the four-type taxonomy — automation_type is the public-API type, not the DB string. The DB string is in _internal_type for debugging only.