Fix tier logging: capture actual_tier, fix parse_run_block regex, remove reply_text truncation

- Add tier_capture param to _run_agent_pipeline; append tier after determination
- Capture actual_tier in run_agent_task from tier_capture list
- Log tier in replied-in line: [agent] replied in Xs tier=Y
- Remove reply_text[:200] truncation (was breaking benchmark keyword matching)
- Update parse_run_block regex to match new log format; llm/send fields now None

Fixes #1, #3, #4

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/integration/common.py

@@ -199,14 +199,13 @@ def parse_run_block(lines, msg_prefix):
             if txt:
                 last_ai_text = txt
 
-        m = re.search(r"replied in ([\d.]+)s \(llm=([\d.]+)s, send=([\d.]+)s\)", line)
+        m = re.search(r"replied in ([\d.]+)s(?:\s+tier=(\w+))?", line)
         if m:
-            tier_m = re.search(r"\btier=(\w+)", line)
-            tier = tier_m.group(1) if tier_m else "unknown"
+            tier = m.group(2) if m.group(2) else "unknown"
             reply_data = {
                 "reply_total": float(m.group(1)),
-                "llm":         float(m.group(2)),
-                "send":        float(m.group(3)),
+                "llm":         None,
+                "send":        None,
                 "tier":        tier,
                 "reply_text":  last_ai_text,
                 "memory_s":    None,