Barrel Cleanup: Service Packages Group

[nnoce14]

Goal: Clean up barrel files and star re-exports from @ocom/service-blob-storage, @ocom/service-otel, and @ocom/service-token-validation. Refactor all imports, add per-package Biome error overrides. Do not await global discovery—conflicts handled in PRs.

Scope: packages/ocom/service-blob-storage, packages/ocom/service-otel, packages/ocom/service-token-validation

Tasks:

• Audit index.ts and pure barrels in each package
• Remove barrel files
• Refactor any affected imports
• Add Biome error-level overrides scoped per package
• Run lint/build/tests

Success Criteria:

• No barrels/star re-exports in services group
• Biome config error for each
• All builds/tests pass

Checklist:

• Audit barrels (all packages)
• Remove barrels/refactor imports
• Add Biome overrides
• Run verify