pressure: calculate_pressure counts every block kind

Was Text-only, blind to tool_use/tool_result/reasoning — ~74% of a real
thread. This is the number behind the 80/90/95 tier warnings and the
archivist's emergency trigger, so both fired late or not at all.

countable_text() (7530d6d) is exhaustive. turn.rs::bifrost_pressure is
still a second counter and still blind to tool_calls by shape; collapsing
the two is not done.

src/server/consciousness_engine.rs

@@ -1087,11 +1087,7 @@ Resolve entries: `[YYYY-MM-DD HH:MM] RESOLVED — note`"#;
         let tokens: usize = messages
             .iter()
             .flat_map(|m| &m.blocks)
-            .filter_map(|b| match b {
-                crate::core::session::ContentBlock::Text { text } => Some(text.as_str()),
-                _ => None,
-            })
-            .map(|t| self.counter.count(t))
+            .map(|b| self.counter.count(b.countable_text().as_ref()))
             .sum();
         let limit = context_limit.max(1);
         (tokens as f32 / limit as f32).min(1.0)