Two new tests verify end-to-end Tier 3 wiring:
- tier3_shell_ingest_searchable: .sh file → --code-lang shell search →
Citation::Code { symbol: None, lang: "shell" }, chunker_version
"code-text-paragraph-v1".
- tier3_yaml_fallback_picks_up_non_k8s_yaml: docker-compose-shaped yaml
(no apiVersion/kind) triggers k8s chunker's Ok(vec![]) result, fallback
retries with Tier 3 → Citation::Code { symbol: None, lang: "yaml" } and
chunker_version "code-text-paragraph-v1".
Also fixes a bug in CodeTextParagraphV1Chunker (Task B): short paragraphs
(≤80 lines) were emitted with split_key=None, causing all paragraphs from the
same document to share the same chunk_id (UNIQUE constraint violation at
put_chunks). Fix: always use para.line_start as split_key so every paragraph
gets a distinct id regardless of size.
Brings code_ingest_smoke to 14 tests (Tier 1: 9, Tier 2: 3, Tier 3: 2).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>