v0.1.0

Added

• Full-text search over ActiveRecord with SQLite FTS5: the fts5_scope DSL, the
  create_fts5_index migration helper (round-trips through schema.rb), a query
  sanitizer that makes untrusted input safe, BM25 relevance ranking via
  order_by_rank, model-owned callback sync, and Model.reindex plus a rake task.
• Vector search with sqlite-vec through the
  neighbor gem: the vec_scope DSL, the
  create_vec_index migration helper, an app-registered SqliteSearch.embedder,
  async embedding through SqliteSearch::EmbedJob (with a sync: :inline option
  and a configurable queue), and Model.reembed plus a rake task.
• Hybrid search: hybrid_scope fuses an fts5_scope and a vec_scope with
  Reciprocal Rank Fusion, with an optional, degradable SqliteSearch.reranker.
• Exact pre-filtering by chaining: conditions placed before .search/.semantic
  (for example Post.where(tenant_id: 5).search("...")) push into both arms.
• Rails generators for the FTS5 and vec migrations.
• Derived text: source: and watch: on fts5_scope and vec_scope index text
  computed in Ruby and resync when the watched attributes change.
• vec_scope ..., sync: :manual with record.reembed for apps that run their own
  embedding pipeline.
• Relevance thresholds: order_by_rank(threshold:), and per-arm
  fts5_threshold: / vec_threshold: on hybrid scopes.
• A reranker can return [record, score] pairs, which set each result's
  <name>_score to the reranker's score.