Migrate to VectorChord and match upstream

Signed-off-by: Juhyung Park <qkrwngud825@gmail.com>

README.md

@@ -38,6 +38,8 @@ pgvector is included in the official PostgreSQL's APT repository:
 sudo apt install postgresql(-17)-pgvector
 ```
 
+ * [VectorChord](https://docs.vectorchord.ai/vectorchord/getting-started/installation.html)
+
  * [FFmpeg](https://github.com/FFmpeg/FFmpeg)
 
 Immich uses FFmpeg to process media.
@@ -114,6 +116,7 @@ postgres=# create user immich with encrypted password 'YOUR_STRONG_RANDOM_PW';
 postgres=# grant all privileges on database immich to immich;
 postgres=# ALTER USER immich WITH SUPERUSER;
 postgres=# CREATE EXTENSION IF NOT EXISTS vector;
+postgres=# CREATE EXTENSION IF NOT EXISTS vchord CASCADE;
 postgres=# \q
 ```
 

env

@@ -9,7 +9,6 @@ NODE_ENV=production
 
 DB_USERNAME=immich
 DB_DATABASE_NAME=immich
-DB_VECTOR_EXTENSION=pgvector
 
 # The location where your uploaded files are stored
 UPLOAD_LOCATION=./library

install.sh

@@ -37,6 +37,22 @@ if [[ "$USER" != "immich" ]]; then
   exit 0
 fi
 
+# Sanity check, users should have VectorChord enabled
+if psql -U immich -c "SELECT 1;" > /dev/null 2>&1; then
+  # Immich is installed, check VectorChord
+  if ! psql -U immich -c "SELECT * FROM pg_extension;" | grep "vchord" > /dev/null 2>&1; then
+    echo "VectorChord is not enabled for Immich."
+    echo "Please read https://github.com/immich-app/immich/blob/main/docs/docs/administration/postgres-standalone.md"
+    exit 1
+  fi
+fi
+if [ -e "$IMMICH_PATH/env" ]; then
+  if grep -q DB_VECTOR_EXTENSION "$IMMICH_PATH/env"; then
+    echo "Please remove DB_VECTOR_EXTENSION from your env file"
+    exit 1
+  fi
+fi
+
 BASEDIR=$(dirname "$0")
 umask 077