feat(tools): converge two-tier Quick/Pro selector onto .no fork

Port the dobetterlegal-tools two-tier quality stack to dobetternorge.no:
QUALITY_TIERS registry + resolveTier (ToolModels), dbnToolsResolveToolRun
(bootstrap), tier read+charge in the 6 analytical endpoints, Quick/Pro
UI + payload.tier on the 6 tool pages/JS, and the bounded
corpusContextForSummarize RAG fix (per-passage trim + total budget +
reranker_enabled). Back-compat: requests without `tier` keep legacy
engine behavior.

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

api/summarize.php

@@ -6,11 +6,12 @@ require_once __DIR__ . '/../includes/ToolModels.php';
 
 dbnToolsRequireMethod('POST');
 dbnToolsRequireAuth();
-$ftUid = dbnToolsFreeTierCheck('summarize');
 
 $input    = dbnToolsJsonInput(400000);
 $language = dbnToolsNormalizeLanguage($input['language'] ?? 'en');
-$engine   = ToolModels::engineForUser($ftUid, (string)($input['engine'] ?? 'azure_mini'));
+$run      = dbnToolsResolveToolRun('summarize', $input);
+$ftUid    = $run['ftUid'];
+$engine   = $run['engine'];
 $depth    = in_array($input['depth'] ?? '', ['brief', 'standard', 'detailed'], true)
     ? (string)$input['depth'] : 'standard';
 $slices   = is_array($input['slices'] ?? null) ? array_values(array_filter($input['slices'])) : [];
@@ -73,7 +74,9 @@ try {
     $result = (new DbnLegalToolsService())->summarizeWithContext($text, $language, $engine, $corpusContext, $depth);
 
     if ($ftUid > 0) {
-        $balance          = dbnToolsFreeTierDeduct($ftUid, 'summarize');
+        $balance          = $run['credits'] === null
+            ? dbnToolsFreeTierDeduct($ftUid, 'summarize')
+            : dbnToolsFreeTierDeductAmount($ftUid, 'summarize', $run['credits'], $run['metadata']);
         $result['balance'] = $balance;
     }