Add MINUS patterns and bulk delete/update operations

[flyon]

Summary

Implements three core features for the linked data DSL:

1. MINUS patterns — .minus() on QueryBuilder to exclude results matching a pattern
2. Bulk delete operations — .deleteAll() and .deleteWhere() for deleting multiple entities
3. Conditional update operations — .update().where() and .update().forAll() for bulk updates

All features follow the existing IR → Algebra → SPARQL pipeline and reuse existing serialization logic.

Key Changes

MINUS Patterns (QueryBuilder)

• Added .minus() method supporting multiple call styles:
  • .minus(Shape) — exclude by shape type
  • .minus(p => p.prop.equals(val)) — exclude by condition
  • .minus(p => p.prop) — exclude by property existence
  • .minus(p => [p.prop1, p.nested.prop2]) — multi-property with nested path support
• New IRMinusPattern type in IR representing MINUS blocks
• PropertyPathSegment type threads through desugaring/canonicalization pipeline untransformed
• IRLower converts property paths to chained IRTraversePattern sequences
• selectToAlgebra wraps algebra in SparqlMinus nodes for each MINUS pattern

Bulk Delete Operations

• DeleteBuilder now supports three modes: 'ids' (existing), 'all' (new), 'where' (new)
• New .all() and .where() methods on DeleteBuilder
• Shape.deleteAll() and Shape.deleteWhere(fn) static convenience methods
• New IRDeleteAllMutation and IRDeleteWhereMutation types
• deleteAllToAlgebra() includes schema-aware blank node cleanup via walkBlankNodeTree() — recursively deletes blank nodes referenced by blank-node-typed properties
• deleteWhereToAlgebra() adds filter conditions to WHERE clause

Conditional Update Operations

• UpdateBuilder now supports three modes: 'for' (existing), 'forAll' (new), 'where' (new)
• New .forAll() and .where() methods on UpdateBuilder
• New IRUpdateWhereMutation type
• Extracted shared field processing into processUpdateFields() helper, parameterized by subject term (IRI vs variable)
• updateWhereToAlgebra() reuses field processing logic with variable subject

API Cleanup

• Deprecated sortBy() — users should use orderBy() instead
• Shape.update() now requires data parameter (no longer optional)
• DeleteBuilder.from(shape, ids) replaces .for() for ID-based deletion

Infrastructure

• Added lazy-loading helpers for ShapeClass and shacl ontology to avoid circular dependencies
• New wrapOldValueOptionals() helper wraps old-value triples in OPTIONAL (LEFT JOIN) for UPDATE operations
• SparqlStore routes mutations by kind field to appropriate conversion functions
• Comprehensive test fixtures and golden SPARQL assertions for all new features

Implementation Details

• Property path threading: PropertyPathSegment[][] passes through Raw → Desugared → Canonical stages untransformed; only IRLower converts to traverse patterns (requires alias generation)
• MINUS runtime type detection: Callback return type detection in toRawInput() distinguishes between Evaluation (WHERE), QueryBuilderObject (single property), and QueryBuilderObject[] (multi-property) without separate method names
• Blank node cleanup: Schema-aware deletion recursively walks SHACL shape definitions to identify and clean up blank node references, handling nested blank node types
• Shared update logic: processUpdateFields() and wrapOldValueOptionals() extracted to support both ID-based and condition-based updates with consistent field handling