fix(jobs): 留痕清理独立接通历史存储开关；精简死逻辑并对齐陈旧注释

src/main/kotlin/com/gzzn/omms/msgexchange/processing/Pump.kt

@@ -81,7 +81,7 @@ class Pump(
         //
         // 水位以内的行都是收报按 ID 顺序发现并登记的；水位之外的行只可能来自兼容入口
         // 直接写 PROC_STATE（它不参与水位）。若允许领取，它就会越过那些尚未入队的较小 ID，
-        // 破坏 FIFO（缺口 G2）。这种行在空洞补齐、`W` 追平之后自然可领取。
+         // 破坏 FIFO（不变量"只领取已发现的行"，message-lifecycle.md §11）。这种行在空洞补齐、`W` 追平之后自然可领取。
         val watermark = cursor.load().committedUpTo
         if (head.msgId > watermark) {
             warnBeyondWatermark(head.msgId, watermark)
@@ -175,21 +175,7 @@ class MessageProcessor(
         }
     }
 
-    /** @return 这条消息是否落到终态；回填由扫描驱动，调用方不再据此立即回填。 */
-    private fun processInternal(head: ProcState): Boolean {
-        // 守卫：手工/遗留 FAILED 行若 attempts 已达上限，直接终态（防止退避到期后无限重试）
-        if (head.state == ProcStatus.FAILED && procFailure.scheduler.exhausted(head.attempts)) {
-            log.error("head exhausted at entry -> DEAD msgId={} attempts={}", head.msgId, head.attempts)
-            procState.markTerminal(
-                head.msgId, ProcStatus.DEAD,
-                errorClass = ErrorClass.EXHAUSTED,
-                lastError = head.lastError ?: "max-attempts",
-                attempts = head.attempts,
-                now = clock.instant(),
-            )
-            return true
-        }
-
+    private fun processInternal(head: ProcState) {
         val raw = inbox.rawOf(head.msgId)
         if (raw == null) {
             log.error("raw missing -> DEAD(MALFORMED) msgId={}", head.msgId)
@@ -215,7 +201,7 @@ class MessageProcessor(
                 val owner = procState.ownerOfIdentity(identity) ?: -1L
                 log.info("duplicate-of:{} -> SKIPPED msgId={}", owner, head.msgId)
                 procState.markTerminal(head.msgId, ProcStatus.SKIPPED, lastError = "duplicate-of:$owner", now = clock.instant())
-                return true
+                return
             }
         }
 
@@ -260,16 +246,14 @@ class MessageProcessor(
                 lastError = result.reason.take(1000),
                 now = clock.instant(),
             )
-            return true
+            return
         }
 
         // Succeeded / ReplaySkipped：SUCCEEDED 终态与回填意图已由处理器在自己的事务内落库
         log.info("SUCCEEDED msgId={} kind={}", head.msgId, decoded.typeTag)
-        return true
     }
 
-    private fun deadMalformed(head: ProcState, detail: String): Boolean {
+    private fun deadMalformed(head: ProcState, detail: String) {
         procState.markTerminal(head.msgId, ProcStatus.DEAD, errorClass = ErrorClass.MALFORMED, lastError = detail, now = clock.instant())
-        return true
     }
 }