Module grounding 

Grounding trait for evidence verification (V2 Pattern).

v0.2.0 — Rewritten to match how all sisters ACTUALLY implement grounding.

The real pattern across Memory, Vision, Identity, and Codebase is:

1. ground(claim) → Search-based claim verification (BM25, word-overlap, etc.)
2. evidence(query) → Get detailed evidence for a query
3. suggest(query) → Fuzzy fallback when exact match fails

Key differences from v0.1.0:

• No evidence_id parameter — all sisters SEARCH for evidence
• ground() takes a claim string, not a GroundingRequest with evidence_id
• Three-status result: verified / partial / ungrounded
• Optional per sister (Time has no grounding)

Structs

EvidenceDetail

Detailed evidence item returned by the evidence() method.

GroundingEvidence

A piece of evidence returned by grounding.

GroundingResult

Result of a grounding check.

GroundingSuggestion

A suggestion returned when a claim doesn’t match exactly

Enums

EvidenceType

Type of evidence (kept for categorization, but no longer used as the primary lookup mechanism).

GroundingStatus

Status of a grounding check

Traits

Grounding

Grounding capability — sisters that verify claims implement this.