feat: implement AI gateway phase one runtime

apps/api/migrations/0008_pricing_image_single_rule.sql

@@ -0,0 +1,26 @@
+DELETE FROM model_pricing_rules
+WHERE resource_type = 'image_edit'
+   OR rule_key = 'image_edit';
+
+DELETE FROM model_pricing_rules old_rule
+USING model_pricing_rules image_rule
+WHERE old_rule.rule_set_id IS NOT DISTINCT FROM image_rule.rule_set_id
+  AND old_rule.rule_key = 'image_generation'
+  AND image_rule.rule_key = 'image';
+
+UPDATE model_pricing_rules
+SET rule_key = 'image',
+    display_name = '图像',
+    resource_type = 'image',
+    unit = 'image',
+    base_price = 10,
+    base_weight = '{"meter":"count"}'::jsonb,
+    dynamic_weight = '{"resolutionFactors":{"1K":1,"2K":1.5,"3K":1.75,"4K":2,"8K":4},"qualityFactors":{"low":0.5,"medium":1,"high":1.5}}'::jsonb,
+    calculator_type = 'unit_weight',
+    dimension_schema = '{"dimensions":["count","resolution","quality"],"defaults":{"count":1,"quality":"medium","resolution":"1K"}}'::jsonb,
+    formula_config = '{"formula":"count * base_price * resolution_factor * quality_factor"}'::jsonb,
+    priority = 30,
+    metadata = metadata || '{"migration":"0008_pricing_image_single_rule"}'::jsonb,
+    updated_at = now()
+WHERE resource_type = 'image'
+  AND rule_key IN ('image_generation', 'image');