skill: package mongodb/agent-skills into dockyard

[JAORMX]

Package agent skills from mongodb/agent-skills into the Dockyard registry.

Source

• Repo: https://github.com/mongodb/agent-skills
• License: Apache-2.0
• Upstream HEAD (at survey time): eba6ae3 (2026-04-17)
• Skill count upstream: ~8
• Trust signal: Official MongoDB

Candidate skills

• atlas-stream-processing
• mongodb-connection
• mongodb-mcp-setup
• mongodb-natural-language-querying
• mongodb-query-optimizer
• mongodb-schema-design
• mongodb-search-and-ai

Acceptance criteria

• One spec.yaml per selected skill under skills/<name>/
• spec.ref pinned to an audited upstream commit SHA
• task validate-skill passes for each
• task scan-skill findings triaged
• Single PR grouping all MongoDB skills (branch skills/mongodb)

Part of the vendor-by-vendor sweep following #466 (Trail of Bits).