refactor(#104): prune unused ChatMessageDao APIs and stale test stubs (#160)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/data/local/ChatMessageDao.kt

@@ -4,13 +4,9 @@ import androidx.room.Dao
 import androidx.room.Insert
 import androidx.room.OnConflictStrategy
 import androidx.room.Query
-import kotlinx.coroutines.flow.Flow
 
 @Dao
 interface ChatMessageDao {
-    @Query("SELECT * FROM chat_messages WHERE session_id = :sessionId ORDER BY timestamp ASC")
-    fun observeMessagesForSession(sessionId: String): Flow<List<ChatMessageEntity>>
-
     @Query("SELECT * FROM chat_messages WHERE session_id = :sessionId ORDER BY timestamp ASC")
     suspend fun getMessagesForSession(sessionId: String): List<ChatMessageEntity>
 
@@ -19,29 +15,4 @@ interface ChatMessageDao {
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     suspend fun upsertAll(messages: List<ChatMessageEntity>)
-
-    @Query("UPDATE chat_messages SET content = :content, is_streaming = 0 WHERE id = :id")
-    suspend fun finalizeMessage(
-        id: String,
-        content: String,
-    )
-
-    @Query("UPDATE chat_messages SET content = :content WHERE id = :id")
-    suspend fun updateContent(
-        id: String,
-        content: String,
-    )
-
-    @Query("DELETE FROM chat_messages WHERE session_id = :sessionId")
-    suspend fun deleteMessagesForSession(sessionId: String)
-
-    @Query(
-        "DELETE FROM chat_messages WHERE session_id NOT IN " +
-            "(SELECT DISTINCT session_id FROM chat_messages " +
-            "ORDER BY timestamp DESC LIMIT :keepSessions)",
-    )
-    suspend fun pruneOldSessions(keepSessions: Int)
-
-    @Query("SELECT COUNT(*) FROM chat_messages")
-    suspend fun count(): Int
 }