feat(ingest): downstream sales-research B2B prospect and ICP qualification skill

[harshsinghmp]

Classification

actionable-feature

Context & Rationale

cmlb8lcmu0005l5048bnrh1g3_sales-research provides systematic B2B sales intelligence: Ideal Customer Profile (ICP) scoring, competitor battlecards, account discovery, and value-driver mapping.

Scope & Ingestion Plan

1. Package skill into skills/marketing/sales-research.
2. Register in skills.manifest.json under Growth, Marketing & Social.

Verification Criteria

• skills/marketing/sales-research/SKILL.md exists and passes manifest schema validation.
• Registered in skills.manifest.json.
• Validated via bun test.