Actually run all the components in parallel threads

I have much to learn about async Rust, but the gist of it is that running try_join
on a bunch of futures makes it run them in one task which is not at all what I want
because all the components here are separate from each other. Apparently to make it
spawn separate tasks, you need to use tokio::spawn. You live and learn.

Ideally of course these should be separate processes entirely, but for now I'm
far too lazy to deal with that

src/main.rs

@@ -54,10 +54,10 @@ async fn main() -> Result<()> {
 
     info!("Starting everything up");
 
-    tokio::try_join!(
-        post_indexer.start(),
-        profile_classifier.start(),
-        feed_server.serve(),
+    let _ = tokio::try_join!(
+        tokio::spawn(post_indexer.start()),
+        tokio::spawn(profile_classifier.start()),
+        tokio::spawn(feed_server.serve()),
     )?;
 
     Ok(())

src/processes/post_indexer.rs

@@ -34,7 +34,7 @@ impl PostIndexer {
 }
 
 impl PostIndexer {
-    pub async fn start(&self) -> Result<()> {
+    pub async fn start(self) -> Result<()> {
         info!("Starting");
 
         loop {

src/processes/profile_classifier.rs

@@ -23,7 +23,7 @@ impl ProfileClassifier {
         }
     }
 
-    pub async fn start(&self) -> Result<()> {
+    pub async fn start(self) -> Result<()> {
         info!("Starting");
 
         loop {