Alluvia 0.4.0 — recall

Recall becomes the front door — and any source can feed it.

• alluvia recall "<problem>" — the fastest path from "I know I solved
  this before" to cited proof. Fuses your themes, bridges, and unfinished
  threads into a few high-signal hits, each with sources and status.
  Retrieval only — zero LLM spend. --handoff emits a paste-ready
  context block for whatever assistant you're in; --json for scripting.
• MCP recall_now — the same recall inside Claude Code / Cursor,
  mid-conversation. Read-only; spends nothing. When git is present, recall
  conservatively flags "possibly implemented in " by matching your
  local history — a pointer to verify, never a claim.
• Bare alluvia now prints a now-view: open loops, freshest bridges,
  and whether a refresh is due.
• alluvia demo — every lens alive in ~30 seconds on a tiny synthetic
  corpus, with no API key and no LLM calls, in its own store (never your
  real one). --clean removes it.
• A source contract (#15) — anything that writes
  normalized-session JSONL is now a source:
  alluvia ingest --source jsonl --path <file|dir>. Multi-machine history
  without cloud, and formats we don't ship parsers for arrive normalized.
• Internally, the sqlite-vec and numpy vector backends now return the same
  cosine scores, so ranking is identical whichever is active.

Install: uv tool install alluvia · try it keyless: alluvia demo · Closes #15