feat(query): support BIND and VALUES in the next SPARQL pipeline (#562)

[remiceres]

Closes #562

Summary

Support SPARQL 1.1 inline data (VALUES / Table) and variable assignment (BIND / Extend) in core.next.query.

Key Changes

• VALUES Clause:
  • Preserve VALUES headers, UNDEF and bag semantics.
  • Compile trailing VALUES as a join in WhereCompiler.
  • Support both inline data in WHERE graph patterns and trailing query-level VALUES.
• BIND Clause:
  • Implement Extend(mu, var, expr) evaluation to assign computed values to variables.
  • Correctly enforce scope across basic graph patterns, UNION, GRAPH, and subqueries.
• Repository API & Base IRIs:
  • Expose query-document base IRI prepare overloads on RepositoryConnection and CoreseRepositoryConnection.
• Quality & Verification:
  • All 2,816 local unit tests passing.
  • Headless SonarLint scan reports 0 issues across all changed Java files.
  • Strict modular boundaries verified by NextModuleBoundaryTest.

[github-actions]

Overall Project	53.71% -0.02%	🍏
Files changed	94.65%	🍏

File	Coverage
AbstractAstVisitor.java	100%	🍏
SparqlAntlrDispatcher.java	100%	🍏
GraphAst.java	100%	🍏
WhereCompiler.java	97.04%	🍏
ValueMappingAst.java	94.44% -5.56%	🍏
CoreseAstQueryBuilder.java	93.09%	🍏
ValuesAst.java	93.07% -6.93%	🍏
CoreseTupleQueryResult.java	92.06%	🍏
ValuesAstListener.java	91.97% -2.01%	🍏
NextSparqlPipelineExecutor.java	89.15%	🍏
SparqlAstBuilder.java	87.74% -0.71%	🍏
CoreseBindingSet.java	87.13% -6.93%	🍏
EvalGraph.java	84.36%	🍏
SparqlQueryAstBuilder.java	83.85% -1.26%	🍏
CoreseRepositoryConnection.java	82.62%	🍏
VariableScopeAnalyzer.java	80.83% -0.57%	🍏
SparqlTermBuilder.java	77.43%	🍏
NodeImpl.java	74.76%	🍏
SparqlTermResolver.java	68.59%	🍏
Exp.java	46.8% -0.21%	❌
BgpAstListener.java	46.67%	🍏
Eval.java	44.52% -0.21%	🍏

[github-actions]

Test Results

  425 files    425 suites   21s ⏱️
2 797 tests 2 797 ✅ 0 💤 0 ❌
2 816 runs  2 816 ✅ 0 💤 0 ❌

Results for commit 93f42ae.