feedback: thumb up/down on logs + reviewer self-score 0-10

Two unrelated features bundled because they ship together and share
migration 0028.

Strategic-log feedback (thumb up/down):
- New strategic_log_feedback table with UNIQUE(log_id, user_id) so each
  user has one vote per log, flippable in place (up -> down -> clear).
  UI shows aggregate counts only.
- app/services/log_feedback.py: set_vote, get_counts, sign/verify
  feedback tokens (same itsdangerous pattern as auth.sign_pending,
  30-day TTL for email links).
- POST /api/log/{id}/feedback: web vote, auth required, returns counts
  + the requesting user's own vote.
- GET /feedback?token=...&vote=...: email-link target, no auth, signed
  token encodes (user, log, vote), renders feedback_thanks.html.
- partials/log.html: thumbs row below content, JS-driven swap via the
  POST endpoint. Dashboard latest-log card and /log page both render
  this partial via htmx, so the buttons appear in all three surfaces.
- digest emails: a "How was today's read?" row above the unsub footer,
  with signed-token URLs against the latest StrategicLog at send time.
  Plain-text fallback included.

Reviewer self-score (0-10):
- _SYSTEM_PROMPT asks for an integer score with anchors (10 exemplary,
  5 borderline, 0 unfit). Verdict gains score: int | None.
- Deterministic-layer hits get score=0 (hard rule, no nuance);
  error rows get None; LLM rows get the model's score clamped 0..10.
- ReviewerVerdict.score, StrategicLog.reviewer_score, and
  IndicatorSummary.reviewer_score all new SMALLINT NULL columns.
- ai_log_job + indicator_summary_job persist verdict.score onto their
  content rows when committing the row alongside content.

Tests:
- tests/test_strategic_log_feedback.py: vote, flip, clear, aggregate
  across users, invalid vote, token round-trip + tamper + garbage +
  'clear' not signable for email path.
- tests/test_output_review.py: score parsing, clamping (>10, <0),
  missing/non-numeric -> None, deterministic-layer score=0.

Full suite: 427 passed (was 412), 5 skipped, no regressions.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/templates/feedback_thanks.html

@@ -0,0 +1,30 @@
+{% extends "public_base.html" %}
+{% block title %}{{ BRAND_NAME }} · Feedback{% endblock %}
+
+{% block main %}
+<section class="public-section" style="max-width:520px; margin:60px auto; text-align:center;">
+  {% if ok %}
+    <h1 class="public-section__head" style="margin-bottom:14px;">
+      {% if vote == 'up' %}Thanks for the thumbs up.{% else %}Thanks for the thumbs down.{% endif %}
+    </h1>
+    <p style="color:var(--muted); font-size:14px; line-height:1.55;">
+      Your vote on this strategic log is recorded.
+      {% if counts %}
+        Current tally: <strong>{{ counts.up }}</strong> &#x1F44D; ·
+        <strong>{{ counts.down }}</strong> &#x1F44E;.
+      {% endif %}
+    </p>
+    <p style="margin-top:24px;">
+      <a href="/" class="btn-primary">Open the dashboard</a>
+    </p>
+  {% else %}
+    <h1 class="public-section__head" style="margin-bottom:14px;">Couldn&rsquo;t record that vote</h1>
+    <p style="color:var(--muted); font-size:14px; line-height:1.55;">
+      {{ message or "Something went wrong; please try again from the dashboard." }}
+    </p>
+    <p style="margin-top:24px;">
+      <a href="/" class="btn-primary">Open the dashboard</a>
+    </p>
+  {% endif %}
+</section>
+{% endblock %}