Disable ANSI colors in logs and fix fail2ban regex

- Add with_ansi(false) to all tracing_subscriber fmt layers so log
  output (both stdout and file) is plain text without escape codes.
  This is critical for Docker deployments and fail2ban log parsing.

- Remove ^ anchor from fail2ban failregex since log lines have a
  timestamp/level prefix before RATE_LIMIT.

deploy/fail2ban/filter.d/reverse-proxy.conf

@@ -1,3 +1,3 @@
 [Definition]
-failregex = ^RATE_LIMIT client_ip=<HOST> host=\S+ path=\S+ status=\d+$
+failregex = RATE_LIMIT client_ip=<HOST> host=\S+ path=\S+ status=\d+
 ignoreregex =

src/logging/mod.rs

@@ -51,7 +51,7 @@ fn init_json(env_filter: EnvFilter, log_file_path: &Option<String>, level: Level
         }
         None => {
             let layer = tracing_subscriber::fmt::layer()
-                .json()
+                .with_ansi(false)
                 .with_filter(env_filter);
             tracing_subscriber::registry().with(layer).try_init()?;
         }
@@ -72,8 +72,11 @@ fn init_text(env_filter: EnvFilter, log_file_path: &Option<String>, level: Level
             let file_writer = Arc::new(file);
 
             let file_env_filter = make_env_filter(level);
-            let stdout_layer = tracing_subscriber::fmt::layer().with_filter(env_filter);
+            let stdout_layer = tracing_subscriber::fmt::layer()
+                .with_ansi(false)
+                .with_filter(env_filter);
             let file_layer = tracing_subscriber::fmt::layer()
+                .with_ansi(false)
                 .with_writer(file_writer)
                 .with_filter(file_env_filter);
             tracing_subscriber::registry()
@@ -82,7 +85,9 @@ fn init_text(env_filter: EnvFilter, log_file_path: &Option<String>, level: Level
                 .try_init()?;
         }
         None => {
-            let layer = tracing_subscriber::fmt::layer().with_filter(env_filter);
+            let layer = tracing_subscriber::fmt::layer()
+                .with_ansi(false)
+                .with_filter(env_filter);
             tracing_subscriber::registry().with(layer).try_init()?;
         }
     }