server: add postgres based newsreader search and disable tantivy

server/src/error.rs

@@ -1,8 +1,8 @@
 use std::{convert::Infallible, str::Utf8Error, string::FromUtf8Error};
 
 use mailparse::MailParseError;
-use tantivy::TantivyError;
-use tantivy::query::QueryParserError;
+#[cfg(feature = "tantivy")]
+use tantivy::{query::QueryParserError, TantivyError};
 use thiserror::Error;
 
 use crate::TransformError;
@@ -31,8 +31,10 @@ pub enum ServerError {
     StringError(String),
     #[error("invalid url: {0}")]
     UrlParseError(#[from] url::ParseError),
+    #[cfg(feature = "tantivy")]
     #[error("tantivy error: {0}")]
     TantivyError(#[from] TantivyError),
+    #[cfg(feature = "tantivy")]
     #[error("tantivy query parse error: {0}")]
     QueryParseError(#[from] QueryParserError),
     #[error("impossible: {0}")]