feat: extensible search engine with person entities (FTS5/tsvector)

crates/adapters/postgres/migrations/0015_search.sql

@@ -0,0 +1,25 @@
+CREATE TABLE IF NOT EXISTS persons (
+    id             TEXT PRIMARY KEY,
+    external_id    TEXT NOT NULL UNIQUE,
+    tmdb_person_id BIGINT UNIQUE,
+    name           TEXT NOT NULL,
+    known_for_department TEXT,
+    profile_path   TEXT
+);
+
+CREATE INDEX IF NOT EXISTS idx_persons_external ON persons (external_id);
+CREATE INDEX IF NOT EXISTS idx_persons_tmdb_id  ON persons (tmdb_person_id);
+
+-- tsvector-based search for movies (equivalent of SQLite FTS5)
+CREATE TABLE IF NOT EXISTS movies_search (
+    movie_id    TEXT PRIMARY KEY REFERENCES movies(id) ON DELETE CASCADE,
+    fts         TSVECTOR NOT NULL DEFAULT ''
+);
+CREATE INDEX IF NOT EXISTS idx_movies_search_fts ON movies_search USING GIN(fts);
+
+-- tsvector-based search for people
+CREATE TABLE IF NOT EXISTS people_search (
+    person_id   TEXT PRIMARY KEY REFERENCES persons(id) ON DELETE CASCADE,
+    fts         TSVECTOR NOT NULL DEFAULT ''
+);
+CREATE INDEX IF NOT EXISTS idx_people_search_fts ON people_search USING GIN(fts);