Remove individual messages embedding SQL

migrations/2026-01-04-000000_add_message_embeddings/down.sql

@@ -1,3 +0,0 @@
--- Drop tables in reverse order
-DROP TABLE IF EXISTS vec_message_embeddings;
-DROP TABLE IF EXISTS message_embeddings;

migrations/2026-01-04-000000_add_message_embeddings/up.sql

@@ -1,19 +0,0 @@
--- Table for storing message metadata and embeddings
--- Embeddings stored as BLOB for proof-of-concept
--- For production with many contacts, consider using sqlite-vec extension
-CREATE TABLE message_embeddings (
-    id INTEGER PRIMARY KEY NOT NULL,
-    contact TEXT NOT NULL,
-    body TEXT NOT NULL,
-    timestamp BIGINT NOT NULL,
-    is_sent BOOLEAN NOT NULL,
-    embedding BLOB NOT NULL,
-    created_at BIGINT NOT NULL,
-    model_version TEXT NOT NULL,
-    -- Prevent duplicate embeddings for the same message
-    UNIQUE(contact, body, timestamp)
-);
-
--- Indexes for efficient queries
-CREATE INDEX idx_message_embeddings_contact ON message_embeddings(contact);
-CREATE INDEX idx_message_embeddings_timestamp ON message_embeddings(timestamp);