hive-agent: finish chrono-clock migration on remaining call sites

hive-agent/src/questions.rs

@@ -32,7 +32,7 @@ use std::path::Path;
 use std::sync::Mutex;
 
 use anyhow::{Context, Result};
-use hive_sh4re::wire_time::now_unix;
+use chrono::{DateTime, Utc};
 use rusqlite::{Connection, params};
 
 const SCHEMA: &str = r"
@@ -78,7 +78,7 @@ pub struct QuestionMirror {
     pub role: Role,
     pub peer: String,
     pub question: String,
-    pub asked_at: i64,
+    pub asked_at: DateTime<Utc>,
 }
 
 /// The harness-local questions mirror. Same sharing/locking shape as
@@ -120,7 +120,7 @@ impl Questions {
         conn.execute(
             "INSERT OR REPLACE INTO questions (id, role, peer, question, asked_at) \
              VALUES (?1, ?2, ?3, ?4, ?5)",
-            params![id, role.as_str(), peer, question, now_unix()],
+            params![id, role.as_str(), peer, question, Utc::now().timestamp()],
         )?;
         Ok(())
     }
@@ -170,12 +170,14 @@ impl Questions {
                 tracing::warn!(%id, %role_str, "questions mirror: unknown role, skipping row");
                 continue;
             };
+            let asked_at_secs: i64 = row.get(4)?;
             out.push(QuestionMirror {
                 id,
                 role,
                 peer: row.get(2)?,
                 question: row.get(3)?,
-                asked_at: row.get(4)?,
+                asked_at: chrono::DateTime::from_timestamp(asked_at_secs, 0)
+                    .unwrap_or_else(Utc::now),
             });
         }
         Ok(out)