Pipeline bugfixes

[suung]

Branch: feature/actwyser-pipeline-bugfixes
Background
Live Customer project hits broken question selection (Select is True), wrong IDs for multi-underscore sets (ESRS / ev_*), gpt-5 tokenizer failures, and error answers shown as success.
Goals

• Fix select, canonical QIDs, tiktoken fallback, error-shaped result handling.
  Acceptance criteria
• Question table select works (no KeyError: False)
• Full YAML question IDs resolve (ESRS / Everest)
• gpt-5.x runs without tiktoken crash
• Failed analyses are not treated/cached as success
• Targeted tests green