Migrate neo4j-go-driver from v4 to v5

[peter7775]

Problem Statement

The project uses github.com/neo4j/neo4j-go-driver/v4 v4.4.8 (see go.mod:15). Driver v4 doesn't support the native vector index or newer Bolt protocol features in Neo4j 5.x. v5's API replaces neo4j.NewDriver, Session, session.Run with context-aware equivalents (neo4j.NewDriverWithContext, SessionWithContext, ExecuteRead/ExecuteWrite).

Proposed Solution

• Bump github.com/neo4j/neo4j-go-driver/v4 to v5 in go.mod.
• Update all call sites in:
  • internal/domain/repositories/neo4j/client.go
  • internal/infrastructure/persistence/neo4j/repository.go
  • internal/application/bootstrap/bootstrap.go
  • internal/application/services/migration/migration.go
  • internal/tests/integration/transform_service_test.go
• Move from Session/Run to SessionWithContext/ExecuteRead/ExecuteWrite, propagating context.Context through the repository/service layers (DDD ports).
• Verify transaction retry logic and error handling match the new API.

Alternative Solutions

Stay on v4 and implement vector search outside Neo4j — rejected, see the "Upgrade Neo4j server from 4.4 to 5.13+" issue.

Use Case

Required step to use Neo4j 5.x's native vector index, and to stay on a driver version that still receives new features.

Priority Level

Important

Implementation Ideas

• Migrate layer by layer: client.go first (lowest level), then repository.go, then bootstrap.go and migration.go.
• Add a context.Context parameter to existing ports in internal/application/ports/ if not already present.
• Run internal/tests/integration/transform_service_test.go against the Neo4j 5.13+ instance from the server upgrade issue.

Additional Context

Depends on: "Upgrade Neo4j server from 4.4 to 5.13+" (needs a Neo4j 5.x test environment available).