Address round-1 review on PR #914:
- Attribute the OCR hop in a fast->structured->ocr inline cascade to
from_tier="structured" (not a second "fast" escalation), so
astrolabe_document_escalation_total per-tier counts stay accurate.
- Add test_inline_fast_structured_ocr_cascade pinning that two-hop path and the
metric attribution.
- Note in classify_from_text that its doc-level control ratio is over full_text
(all pages), not the sampled subset classify_pdf uses.
- Clarify that corrupt_glyphs never lands in the suppressed-escalation counter.
- Dedupe the glyph-corrupt test string into tests/fixtures/glyph_corruption.py.
- Use pytest.approx for the control-char-ratio zero checks (SonarCloud S1244).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
