v0.10.0-beta.1

Fix PostgreSQL 15 RLS predicate comparison context (#120)

## TLDR
Fix PostgreSQL 15 RLS migrations by comparing live and desired
predicates in the same PostgreSQL relation context. Fixes #119.

## What Was Added?
- Normalized PostgreSQL schema inspection for the migration CLI.
- A PostgreSQL 15.1 test collection reusing the shared PostgreSQL
fixture.
- Nine CLI/integration regressions covering fresh creation, unchanged
reapply, USING and WITH CHECK changes, WITH CHECK-only INSERT policies,
qualified/quoted columns, functions, negation, correlated subquery
shadowing, and pre-commit rollback.

## What Was Changed or Deleted?
- Both initial PostgreSQL CLI inspection and inspection inside the
pre-commit integrity callback normalize catalog policies through the
same temporary-view mechanism already used for desired predicates.
- Shared test fixture initialization accepts an explicit image; existing
suites retain PostgreSQL 16.
- Predicate qualification remains intact. Predicate drift detection,
integrity verification, and transaction rollback remain enforced.

## How Do The Automated Tests Prove It Works?
- Before the fix, six PostgreSQL 15 regression cases failed with the
reported predicate-drift integrity error. The same minimal case passed
on PostgreSQL 16, explaining the previous coverage gap.
- All nine PostgreSQL 15 cases now pass. The rollback test requires the
exact integrity-rejection error and strict equivalence of the catalog
policy after rollback, preventing an unrelated callback failure from
satisfying the assertion.
- Installed public DataProviderMigrate 0.10.0-beta reproduced the exact
issue. The rebuilt CLI succeeds with that same YAML and database, then
reruns with zero operations.
- Full `make ci` passed after the latest edits against committed main
plus these six files. Deslop is below the committed duplication ceiling;
no new test clusters were reported.
- Actual Pi read-only security review found no blockers.

## Breaking Changes
- [x] None