Prepare text search during media setup and retain query sessions through promotion

crates/searchi-service/src/store.rs

@@ -82,6 +82,15 @@ impl Store {
         Ok(())
     }
 
+    pub(crate) fn has_compatible_full_generation(&self, expected: &str) -> Result<bool> {
+        let active: Option<String> = self.connection.query_row(
+            "SELECT g.fingerprint FROM semantic_meta m JOIN semantic_generations g ON g.id=m.active_generation WHERE m.singleton=1 AND g.dimensions=?1",
+            [self.dimensions as i64], |row| row.get(0)).optional()?;
+        Ok(active.as_deref().is_some_and(|active| {
+            super::policy_coverage(expected, active) == Some(super::SemanticCoverage::FullMedia)
+        }))
+    }
+
     pub(crate) fn active_fingerprint(&self) -> Result<Option<String>> {
         Ok(self.connection.query_row("SELECT g.fingerprint FROM semantic_meta m JOIN semantic_generations g ON g.id=m.active_generation WHERE m.singleton=1",[],|r|r.get(0)).optional()?)
     }
@@ -525,11 +534,16 @@ impl Store {
         // A consistent read snapshot covers eligibility and materialization.
         let generation_span = trace.begin("semantic.generation_snapshot", parent);
         let snapshot = self.connection.unchecked_transaction()?;
-        let active:Option<i64>=snapshot.query_row("SELECT g.id FROM semantic_generations g JOIN semantic_meta m ON m.active_generation=g.id WHERE g.fingerprint=?1 AND g.dimensions=?2",
-            params![fingerprint,self.dimensions as i64],|row|row.get(0)).optional()?;
-        let Some(active) = active else {
+        let active:Option<(i64,String)>=snapshot.query_row("SELECT g.id,g.fingerprint FROM semantic_generations g JOIN semantic_meta m ON m.active_generation=g.id WHERE g.dimensions=?1",
+            [self.dimensions as i64],|row|Ok((row.get(0)?,row.get(1)?))).optional()?;
+        let Some((active, active_fingerprint)) = active else {
+            trace.end(generation_span, Default::default());
             return Ok(Vec::new());
         };
+        if !super::compatible_query_policy(fingerprint, &active_fingerprint) {
+            trace.end(generation_span, Default::default());
+            return Ok(Vec::new());
+        }
         trace.end(generation_span, Default::default());
         if !self
             .ann_cache
@@ -542,7 +556,8 @@ impl Store {
                     [active],
                     |row| row.get(0),
                 )?;
-                self.prepared_graphs.get(active, fingerprint, &checksum)
+                self.prepared_graphs
+                    .get(active, &active_fingerprint, &checksum)
             })?;
             if let Some(graph) = prepared {
                 self.ann_cache = Some((active, graph));