refactor(log): in-place writer lifecycle and span-based core observability (#7889)

* refactor(log): migrate logging to tracing-estuary pipeline

Swap flexi_logger + clash-verge-logger wiring for the tracing-estuary
crate: buffered file sink with explicit panic/exit drains, live level
switching, and tokio-trace/chrome-trace behind crate features.

AsyncLogger moves in-house (VecDeque ring); file format and rotation
stay unchanged.

* fix(log): reset sidecar writer in place and re-pin service-ipc v2.6.7

Rebuilding the sidecar FileLogWriter on config changes leaked flexi's
unstoppable flusher thread plus an fd each time; the writer is now flushed
and reset in place, matching what the service crate does.
get_clash_logs_by_service drops the CompactString conversion layer now that
service-ipc v2.6.7 returns plain Vec<String>, and AsyncLogger is renamed
LogRing to match.

* refactor(log): span-based observability and log noise cleanup

Instrument spans carry the structure flat lines never could: the core-start
spine (mode, readiness/owner generations, pid, config file), proxy apply and
clear routes with guard generations, service IPC sessions with refusal codes
and outcomes, profile-switch terminal outcomes, subscription fetch strategies,
core upgrades with per-proxy version probes, backup flows, timer tasks, config
generation uids, and the startup setup flow; running-mode changes emit one
guarded transition event each.
~90 hand-written noise lines are gone or demoted (entry+success pairs, polled
getter echoes, phase brackets, window sub-steps, platform install chatter);
errors keep their anyhow chain, operation name, and item id, and swallowed
retry results surface per attempt.

src-tauri/src/cmd/save_profile.rs

@@ -66,14 +66,6 @@ pub async fn save_profile_file(index: String, file_data: Option<String>) -> CmdR
     // 保存新的配置文件
     fs::write(&file_path, &file_data).await.stringify_err()?;
 
-    logging!(
-        info,
-        Type::Config,
-        "[cmd配置save] 开始验证配置文件: {}, 是否为merge文件: {}",
-        file_path_str,
-        is_merge_file
-    );
-
     let changes_applied = handle_saved_profile_file(
         &file_path_str,
         &file_path,
@@ -144,18 +136,8 @@ async fn handle_saved_profile_file(
         (ValidationNoticeTarget::Runtime, "YAML配置文件")
     };
 
-    logging!(
-        info,
-        Type::Config,
-        "[cmd配置save] 开始{}验证: {}",
-        file_type,
-        file_path_str
-    );
-
     match CoreConfigValidator::validate_config_file_outcome(file_path_str, Some(is_merge_file)).await {
-        Ok(outcome) if outcome.is_valid() => {
-            logging!(info, Type::Config, "[cmd配置save] 文件验证通过: {}", file_path_str);
-        }
+        Ok(outcome) if outcome.is_valid() => {}
         Ok(outcome) => {
             logging!(warn, Type::Config, "[cmd配置save] 文件验证失败: {}", outcome);
             restore_original(file_path, original_content, original_existed).await?;
@@ -163,7 +145,7 @@ async fn handle_saved_profile_file(
             return Ok(outcome);
         }
         Err(e) => {
-            logging!(error, Type::Config, "[cmd配置save] 验证过程发生错误: {}", e);
+            logging!(error, Type::Config, "[cmd配置save] 验证过程发生错误: {e:#}");
             restore_original(file_path, original_content, original_existed).await?;
             return Err(e.to_string().into());
         }
@@ -190,7 +172,7 @@ async fn handle_saved_profile_file(
             Ok(outcome)
         }
         Err(err) => {
-            logging!(error, Type::Config, "[cmd配置save] 运行时配置应用错误: {}", err);
+            logging!(error, Type::Config, "[cmd配置save] 运行时配置应用错误: {err:#}");
             restore_original(file_path, original_content, original_existed).await?;
             Err(err.to_string().into())
         }