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/ask.php

@@ -6,10 +6,11 @@ require_once __DIR__ . '/../includes/ToolModels.php';
 
 dbnToolsRequireMethod('POST');
 dbnToolsRequireAuth();
-$ftUid    = dbnToolsFreeTierCheck('ask');
-$engine   = ToolModels::engineForUser($ftUid, 'azure_mini');
 $input    = dbnToolsJsonInput(25000);
 $language = dbnToolsNormalizeLanguage($input['language'] ?? 'en');
+$run      = dbnToolsResolveToolRun('ask', $input);
+$ftUid    = $run['ftUid'];
+$engine   = $run['engine'];
 
 dbnToolsWithChargedTelemetry('ask', $language, $ftUid, function () use ($input, $language, $engine): array {
     $question = dbnToolsInjectDocContent($input, dbnToolsString($input, 'question', 4000, false));
@@ -20,4 +21,4 @@ dbnToolsWithChargedTelemetry('ask', $language, $ftUid, function () use ($input,
         ? trim($input['profile'])
         : null;
     return (new DbnLegalToolsService())->ask($question, $language, $engine, $persona);
-});
+}, $run['credits'], $run['metadata']);