[bug] lore embed-rebuild leaves coverage at 0% while lore_health reports embedder enabled

[kunallanjewar]

Summary

guild lore embed-rebuild enters an inconsistent state where the reset wipes the vector rows but the re-encode loop reports embedder disabled, while lore_health simultaneously reports the embedder as enabled. Net result: the corpus stays at 0% coverage and the rebuild appears to silently no-op.

Affected files

• internal/lore/embed_rebuild_cmd.go
• internal/lore/embed/runtime.go
• internal/lore/embed_wiring.go

Reproduction

1. Inscribe several lore entries on a project with a healthy embedder.
2. Run guild lore embed-rebuild.
3. Observe coverage stays at 0%; encode loop log mentions "embedder disabled".
4. guild lore health simultaneously reports the embedder as enabled.

Acceptance

• After embed-rebuild, vector coverage returns to >0% for projects with active embedders.
• The "embedder disabled" log line and the lore_health "enabled" report do not contradict each other.
• Regression test covers the rebuild-then-encode happy path.