fix: rename collections_public -> metaschema_public, meta_public -> services_public in @pgpmjs/core

[pyramation]

fix: rename schema references in @pgpmjs/core

Summary

Updates hardcoded PostgreSQL schema names in the pgpm export functionality to match the schema rename in constructive-db PR #210:

• collections_public → metaschema_public (database metadata tables)
• meta_public → services_public (service tables like apis, sites, domains)

This is a breaking change that must be coordinated with the constructive-db rename.

Files changed:

• pgpm/cli/src/commands/export.ts - SQL queries for database/schema selection
• pgpm/core/src/export/export-meta.ts - Table config and SQL queries for metadata export
• pgpm/core/src/export/export-migrations.ts - SQL queries and comments in migration export

Review & Testing Checklist for Human

• CRITICAL: Verify this PR is merged and published AFTER constructive-db PR Fix/handle close #210 is deployed, or coordinate simultaneous deployment
• Grep for any remaining collections_public or meta_public references in the pgpm packages that may have been missed
• Verify the pg-ast file changes (version 1.30.2 → 1.30.4) are intentional and not accidental noise
• Test pgpm export command against a database with the new schema names to verify queries work

Recommended test plan: Deploy constructive-db changes first, then run pgpm export against a test database to verify the export functionality works end-to-end with the new schema names.

Notes

• Part of the massive schema rename effort documented in docs/plan/NAMING-PROPOSAL.md in constructive-db
• This PR is a dependency for constructive-db PR Fix/handle close #210 to pass CI (introspection tests)

Link to Devin run: https://app.devin.ai/sessions/6b4b0a2f64084dfaa4a82c0cef42bc43
Requested by: Dan Lynch (@pyramation)

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[devin-ai-integration]

Closing in favor of PR #551 (rename/develop consolidation branch)