feat(dashboard): add automation and curation APIs

[ScriptedAlchemy]

Stack

This is PR 3 of 5 replacing #114. It stacks on #128; review this PR against split/self-improving-02-mcp-integration.

Summary

• Adds dashboard APIs for automation config, scheduler status, run history, run execution, fact proposals, and managed skills.
• Adds dashboard services that bridge automation runs and memory curation state into backend API responses.
• Expands memory curation, memory queries, memory service, and analytics backend support for dashboard diagnostics.
• Splits dashboard API tests into focused modules with shared support helpers.

Verification

• cargo fmt --all -- --check
• git diff --check
• CI on the original equivalent tip was green before splitting.

Replaces part of #114.

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Latest commit: 32f5429

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[chatgpt-codex-connector]

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