Add member Sumsub source key setup

[buildwithnidhi]

What changed

Recreated the Sumsub member/core duplicate KYC fix on latest main so the PR does not include stale staging commits.

• Added optional SUMSUB_MEMBER_SOURCE_KEY env var.
• When KYC starts, Earn checks whether the user is linked to a People record with type member or core.
• For eligible users only, Earn creates the Sumsub applicant with the configured member source key before issuing the SDK token.
• Non-members and empty env continue through the existing normal Sumsub flow.
• Existing Sumsub applicants are left unchanged.

Validation

• pnpm run lint passed with existing warnings only.
• pnpm exec prisma validate passed with existing relation-mode warnings only.
• pnpm run check-types was blocked locally by unrelated src/utils/tokenIconImage.ts sharp module resolution after Prisma generate; no Sumsub files were in the error output.

Replaces the earlier staging-based PR branch that had unrelated stale commits when compared against main.

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Project	Deployment	Actions	Updated (UTC)
earn	Ready	Preview	Aug 13, 2026 9:31am

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