test: expand OOP API test coverage from 13% to >50% (Firebird\Statement, ResultSet, Blob focus)

[satwareAG-ironMike]

Problem

Only 31/236 tests (13.1%) use the new Firebird\* namespace classes. The v11.0 M3 migration is complete in C but barely tested in the OOP layer:

• Firebird\Statement: only 1 test file (fbird_classes_004.phpt)
• Firebird\ResultSet: 3 files total, limited scenarios
• Firebird\Blob: minimal; blob_segfault_after_commit.phpt uses procedural-only

Acceptance Criteria

• >50% of test files exercise at least one Firebird\* class method
• Firebird\Statement: multi-row fetch, re-execute, free scenarios covered
• Firebird\ResultSet: full fetch cycle, close on partial read
• Firebird\Blob: OOP blob create/write/read/close + segfault-after-commit using OOP
• Negative tests: call methods on closed/freed objects

Source

QA Audit 2026-04-09 - Finding T2 (Priority P3)