feat: remove unused module column from metaschema_public tables

[pyramation]

Summary

Removes the dead module text NULL column from the 14 metaschema_public table definitions in metaschema-schema. This column was write-only metadata with zero readers — the generators that populated it live downstream in constructive-db, so here in the upstream schema-only package it has 0 writers and 0 readers, making it a pure orphan column definition. The matching deletion already landed downstream in constructive-db#1594; this upstreams the schema-only half.

Per the repo's split (pgpm-modules = schema/table DDL only, triggers/functions live in constructive-db's metaschema), only the table DDL belongs here.

What changed

• Drop module from 14 metaschema_public/*/table.sql DDLs:
  table, field, schema, view, index, policy, trigger, enum, composite_type, spatial_relation, and the 4 constraint tables (check_/unique_/foreign_key_/primary_key_constraint).

     category metaschema_public.object_category NOT NULL DEFAULT 'app',
  -  module text NULL,
     scope int NULL,

• Remove module from the one verify that lists columns explicitly (view/table.sql); the other 13 use verify_table(...) which only asserts table existence:

  - ... smart_tags, category, module, scope, tags
  + ... smart_tags, category, scope, tags

• Regenerate the sql/ bundle via pgpm package. This aligned the stale pg-extension version (control + Makefile) 0.26.3 → 0.26.5 to match the package version, and replaced metaschema-schema--0.26.3.sql with metaschema-schema--0.26.5.sql.

The 'module' value of the object_category enum and the services_public/metaschema_modules module tables are unrelated concepts and are untouched.

Verification

• pnpm test (metaschema-schema jest): passes — package deploys cleanly without the column.
• pgpm test-packages --full-cycle: all modules pass the deploy → verify → revert → deploy cycle, including services (which depends on metaschema-schema).
• Repo-wide grep confirms no remaining deploy/verify/revert references to the dropped metaschema_public.*.module column.

Link to Devin session: https://app.devin.ai/sessions/4c98e5fc9b7741d182314b5eeea33590
Requested by: @pyramation

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