feat(export): add integration_providers_module to meta export

[pyramation]

Summary

Adds metaschema_modules_public.integration_providers_module to the @pgpmjs/export meta export path, upstreaming the local patches/@pgpmjs+export@0.26.4.patch used in constructive-db (so that patch can be dropped once this is released).

Changes (all in pgpm/export):

• META_TABLE_ORDER + META_TABLE_CONFIG: new integration_providers_module entry, placed after identity_providers_module
• exportMeta (SQL flow): SELECT * FROM metaschema_modules_public.integration_providers_module WHERE database_id = $1 ORDER BY id
• exportGraphQLMeta (GraphQL flow): corresponding queryAndParse('integration_providers_module')

Fields are discovered dynamically at export time, so no per-field config is needed; on databases where the table doesn't exist yet, the exporter skips it silently (existing 42P01 / introspection-miss behavior).

pnpm test in pgpm/export: 142/142 pass.

Link to Devin session: https://app.devin.ai/sessions/fa0bd53e497742d2ab69753d3a7b3f4c
Requested by: @pyramation

[devin-ai-integration]

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