refactor: fix HIGH+MEDIUM architectural violations from code review

HIGH: fix watch_medium data-loss bug, standardize error handling on
ApiError, fix dep direction (rss/template-askama no longer dep on
application), extract ImageFetcher port (remove reqwest from app layer),
move event construction from save_review to use case, extract
infra-wiring crate (DbPool/EventBusBackend dedup), deduplicate
presentation helpers (encode_error, export streaming, multipart parsing)

MEDIUM: split LocalApContentQuery god-trait 10→3 methods, dedup movie
resolution orchestration, add RemoteActorDto/PersonDto mappers, move
AppConfig to infra-wiring, fix SocialQueryPort Uuid→UserId, replace
stringly-typed api-types with domain enums, move count_reviews_in_year
to StatsRepository, dedup event publisher cfg blocks, extract
should_enrich, move group_by_month to application, dedup
count_local_posts, add FederationFlags Default, TUI input helper +
ShowError rename + typed auth errors, api-types cleanup
(UserSettingsDto/UserProfileBase/PreviewRowData)

102 files changed, -681 lines net

crates/worker/src/event_bus.rs

@@ -5,31 +5,7 @@ use anyhow::Context;
 use domain::ports::{EventConsumer, EventPublisher};
 
 use crate::db::DbPool;
-
-#[derive(Clone, Copy)]
-pub enum EventBusBackend {
-    Db,
-    #[cfg(feature = "nats")]
-    Nats,
-}
-
-impl EventBusBackend {
-    pub fn from_env() -> anyhow::Result<Self> {
-        match std::env::var("EVENT_BUS_BACKEND")
-            .unwrap_or_else(|_| "db".to_string())
-            .as_str()
-        {
-            "db" => Ok(Self::Db),
-            #[cfg(feature = "nats")]
-            "nats" => Ok(Self::Nats),
-            #[cfg(not(feature = "nats"))]
-            "nats" => {
-                anyhow::bail!("EVENT_BUS_BACKEND=nats requires the nats feature to be compiled in")
-            }
-            other => anyhow::bail!("unknown EVENT_BUS_BACKEND={other}, expected 'db' or 'nats'"),
-        }
-    }
-}
+use infra_wiring::EventBusBackend;
 
 pub async fn create(
     db_pool: &DbPool,