Add async pipeline with progress monitoring, resumability, and result transparency

Pipeline engine rewritten with combo-first loop: each combination is processed
through all requested passes before moving to the next, with incremental DB
saves after every step (crash-safe). Blocked combos now get result rows so they
appear in the results page with constraint violation reasons.

New pipeline_runs table tracks run lifecycle (pending/running/completed/failed/
cancelled). Web route launches pipeline in a background thread with its own DB
connection. HTMX polling partial shows live progress with per-pass breakdown.

Also: status guard prevents reviewed->scored downgrade, save_combination loads
existing status on dedup for correct resume, per-metric scores show domain
bounds + units + position bars, ensure_metric backfills units on existing rows.

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

src/physcom_web/templates/results/detail.html

@@ -55,19 +55,55 @@
 
 {% if scores %}
 <h2>Per-Metric Scores</h2>
+{% set bounds = {} %}
+{% for mb in domain.metric_bounds %}
+  {% set _ = bounds.update({mb.metric_name: mb}) %}
+{% endfor %}
 <div class="card">
   <table>
     <thead>
-      <tr><th>Metric</th><th>Raw Value</th><th>Normalized</th><th>Method</th><th>Confidence</th></tr>
+      <tr>
+        <th>Metric</th>
+        <th>Raw Value</th>
+        <th>Domain Range</th>
+        <th>Position</th>
+        <th>Normalized</th>
+        <th>Weight</th>
+      </tr>
     </thead>
     <tbody>
       {% for s in scores %}
+      {% set mb = bounds.get(s.metric_name) %}
       <tr>
         <td>{{ s.metric_name }}</td>
-        <td>{{ "%.2f"|format(s.raw_value) if s.raw_value is not none else '—' }}</td>
+        {% set unit = s.metric_unit or '' %}
+        <td class="score-cell">{{ "%.2f"|format(s.raw_value) if s.raw_value is not none else '—' }}{{ ' ' + unit if unit and s.raw_value is not none else '' }}</td>
+        <td>
+          {%- if mb -%}
+            {{ "%.2f"|format(mb.norm_min) }} — {{ "%.2f"|format(mb.norm_max) }}{{ ' ' + unit if unit else '' }}
+          {%- else -%}
+            —
+          {%- endif -%}
+        </td>
+        <td>
+          {%- if mb and s.raw_value is not none -%}
+            {%- if s.raw_value <= mb.norm_min -%}
+              <span class="badge badge-blocked">at/below min</span>
+            {%- elif s.raw_value >= mb.norm_max -%}
+              <span class="badge badge-valid">at/above max</span>
+            {%- else -%}
+              {% set pct = ((s.raw_value - mb.norm_min) / (mb.norm_max - mb.norm_min) * 100) | int %}
+              <div class="metric-bar-container">
+                <div class="metric-bar" style="width: {{ pct }}%"></div>
+              </div>
+              <span class="metric-bar-label">~{{ pct }}%</span>
+            {%- endif -%}
+          {%- else -%}
+            —
+          {%- endif -%}
+        </td>
         <td class="score-cell">{{ "%.4f"|format(s.normalized_score) if s.normalized_score is not none else '—' }}</td>
-        <td>{{ s.estimation_method or '—' }}</td>
-        <td>{{ "%.2f"|format(s.confidence) if s.confidence is not none else '—' }}</td>
+        <td>{{ "%.0f%%"|format(mb.weight * 100) if mb else '—' }}</td>
       </tr>
       {% endfor %}
     </tbody>