some migration changes related to a recent experiment

Author: Praashh

prisma/migrations/20250713000000_baseline_drift/migration.sql

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+-- These columns were added via `prisma db push` and already exist in the database.
+-- This migration file exists only to bring the migration history in sync.
+
+ALTER TABLE "Chat" ADD COLUMN IF NOT EXISTS "title" TEXT;
+ALTER TABLE "Chat" ADD COLUMN IF NOT EXISTS "modelId" TEXT;

prisma/migrations/20260713114757_add_rag_pgvector/migration.sql

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+-- CreateExtension
+CREATE EXTENSION IF NOT EXISTS "vector";
+
+-- CreateEnum
+CREATE TYPE "IngestionStatus" AS ENUM ('PENDING', 'CLONING', 'CHUNKING', 'EMBEDDING', 'COMPLETED', 'FAILED');
+
+-- AlterTable
+ALTER TABLE "Chat" ADD COLUMN     "githubBranch" TEXT,
+ADD COLUMN     "githubRepo" TEXT;
+
+-- CreateTable
+CREATE TABLE "code_chunks" (
+    "id" TEXT NOT NULL,
+    "repoKey" TEXT NOT NULL,
+    "filePath" TEXT NOT NULL,
+    "chunkIndex" INTEGER NOT NULL,
+    "content" TEXT NOT NULL,
+    "language" TEXT,
+    "tokenCount" INTEGER NOT NULL,
+    "embedding" vector(384) NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "code_chunks_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "repo_ingestions" (
+    "id" TEXT NOT NULL,
+    "repoKey" TEXT NOT NULL,
+    "owner" TEXT NOT NULL,
+    "repo" TEXT NOT NULL,
+    "branch" TEXT NOT NULL,
+    "status" "IngestionStatus" NOT NULL DEFAULT 'PENDING',
+    "totalFiles" INTEGER NOT NULL DEFAULT 0,
+    "processedFiles" INTEGER NOT NULL DEFAULT 0,
+    "totalChunks" INTEGER NOT NULL DEFAULT 0,
+    "error" TEXT,
+    "startedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "completedAt" TIMESTAMP(3),
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "repo_ingestions_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "code_chunks_repoKey_idx" ON "code_chunks"("repoKey");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "repo_ingestions_repoKey_key" ON "repo_ingestions"("repoKey");
+
+-- CreateIndex (HNSW for fast cosine similarity search)
+CREATE INDEX "code_chunks_embedding_idx" ON "code_chunks" USING hnsw ("embedding" vector_cosine_ops);

prisma/migrations/20260713120000_remove_rag_pgvector/migration.sql

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+-- DropIndex
+DROP INDEX IF EXISTS "code_chunks_embedding_idx";
+DROP INDEX IF EXISTS "code_chunks_repoKey_idx";
+DROP INDEX IF EXISTS "repo_ingestions_repoKey_key";
+
+-- DropTable
+DROP TABLE IF EXISTS "code_chunks";
+DROP TABLE IF EXISTS "repo_ingestions";
+
+-- AlterTable
+ALTER TABLE "Chat" DROP COLUMN IF EXISTS "githubRepo";
+ALTER TABLE "Chat" DROP COLUMN IF EXISTS "githubBranch";
+
+-- DropEnum
+DROP TYPE IF EXISTS "IngestionStatus";
+
+-- DropExtension
+DROP EXTENSION IF EXISTS "vector";