Add loader-ready ValidationBinding schema corpus

[evomimic]

Summary

Implements #628: deliver the loader-ready MAP Validation Schema as canonical TDL and generated JSON.

Validation applicability is now validation-owned:

ValidationBinding -[AppliesTo]-> TypeDescriptor
ValidationBinding -[UsesRule]-> ValidationRule

This preserves Core ownership of Core descriptors while making rule applicability explicit and traversable.

Changes

• Adds schema-src/map-validation-schema.tdl as the canonical Validation Schema source.
• Adds generated map-validation-schema.json under generated/json-imports.
• Replaces descriptor-owned Validations attachments with ValidationBinding, AppliesTo, UsesRule, and inverse relationships.
• Seeds 51 bindings and distinct rules for all 43 stable DS-* semantic authorities, including DS-CONSTRAINT-001.
• Ensures validation rule and binding descriptor roots expose Core ComponentOf through InstanceRelationships, allowing the package to load after Core.
• Adds Sweettest coverage that loads generated Core, begins a new transaction, then loads the generated Validation Schema.
• Adds clearer loader-response diagnostics for package-import failures.

Validation

• npm run map-schema:check -- schema-src
• npm test
• Sweettest validation package import: 155 holons staged and committed, zero errors.
• Holon Data Validator & Uploader path previously confirmed clean package loading with zero errors and Complete status.
• Pre-push formatting checks passed.

Notes

This PR delivers the Validation Schema corpus and loader-ready package boundary. It does not implement descriptor-aware runtime validation, ValidationRule wrapper dispatch, or Validate execution; those remain later Validation-track work.

[evomimic]

Approved.

PR #643 fulfills #628’s loader-ready Validation Schema scope: canonical TDL and generated JSON, validation-owned ValidationBinding / AppliesTo / UsesRule associations, complete stable DS-* seeding including DS-CONSTRAINT-001, and Sweettest coverage loading Validation after committed Core in a new transaction.

Verified CI is green (ci_pass, fmt, test) on 68bd36d2. Manual verification reported passing for build:happ, build:host, npm test, and npm start; map-schema:check -- schema-src also reports no diagnostics.

The PR appropriately stops at schema/package loading and does not claim to implement runtime descriptor-aware validation, wrapper dispatch, or Validate execution.