fix: update @constructive-io/sdk references to @constructive-io/node

[pyramation]

Summary

Updates metadata, descriptions, and compatibility lines across 5 skill files to reference @constructive-io/node instead of the older @constructive-io/sdk package. This aligns the public skills repo with the broader migration happening in constructive-sdk-agentic-flow#22, which rewrites the agentic flow to use @constructive-io/node with TypeScript blueprints.

Files changed:

• constructive-graphql/SKILL.md — "Design DB" flow step
• constructive-safegres/SKILL.md — compatibility frontmatter
• constructive/SKILL.md — Services & Schemas description
• constructive/references/services-schemas.md — description, compatibility, heading
• constructive/references/services-schemas-entity-fields.md — header

What was NOT changed: The import { createClient } from '@constructive-io/sdk' code examples inside services-schemas.md were intentionally left as-is, since they reflect generated ORM patterns that may still use that import path.

Review & Testing Checklist for Human

• Verify @constructive-io/node exposes the same service management APIs referenced in services-schemas.md (e.g., sdk.api.create, sdk.domain.create, sdk.apiSchema.create). If the node package has different import paths or API shapes, the code examples in services-schemas.md may also need updating.
• Check whether the code examples in services-schemas.md should also be updated — the metadata now says @constructive-io/node but the inline code still imports from @constructive-io/sdk. Confirm whether this inconsistency is acceptable or if the examples should be migrated too.
• Grep for any remaining @constructive-io/sdk references across the skills repo that should also be updated (e.g., graphile-search/references/codegen-sdk-queries.md, constructive-graphql/references/codegen-orm-output.md).

Notes

• Companion PR: constructive-sdk-agentic-flow#22 — the main audit fix that rewrites the agentic flow to use TypeScript blueprints with @constructive-io/node.
• The remaining @constructive-io/sdk references in codegen output docs (codegen-orm-output.md) were left untouched since those describe what the code generator actually produces, which may still emit @constructive-io/sdk imports.

Link to Devin session: https://app.devin.ai/sessions/930052e50e294d428ba075050525e0f8
Requested by: @pyramation

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