fix 4 optimize systemMsg and model default config values

src/Config/PromptBuilderConfig.php

@@ -155,6 +155,8 @@ final class PromptBuilderConfig
             'Do not infer undocumented technical specifications from shop data.',
             'Commercial fields from shop data may only be assigned to a product if the shop item clearly matches the same product identity.',
             'Do not merge a device identified in retrieved knowledge with price, URL, product number, or availability from a different shop item such as a reagent, accessory, kit, consumable, or service item.',
+            'If a shop result has no price field, do not state a price for it.',
+            'Never interpret a missing price or a zero price as free, kostenlos, gratis, or available for 0.00 EUR.',
         ];
     }
 
@@ -214,6 +216,7 @@ final class PromptBuilderConfig
             '- Only use shop price, URL, product number, or availability for the main product when the shop result clearly matches that same main product.',
             '- If the matching shop item appears to be an accessory, reagent, consumable, set, or kit, keep it separate and do not present its commercial fields as the main device.',
             '- If the commercial match is uncertain, say that commercial details for the main product are not clearly available in the provided shop results.',
+            '- If no price is shown for a shop item, omit the price instead of writing 0,00 €, free, kostenlos, or a guessed price.',
         ];
     }
 
@@ -307,6 +310,7 @@ final class PromptBuilderConfig
             '- Use shop data as highest priority only for current commercial fields: price, availability, URL, and current shop-visible naming.',
             '- Use retrieved knowledge as highest priority for technical matching, thresholds, measurement principles, and technical explanation.',
             '- When shop results are present and relevant, include current price and the actual URL if available.',
+            '- If the shop data does not provide a positive price for a result, do not output any price for that result.',
             '- Do not let accessories, bundles, or service items override a technically better product match unless the user explicitly asks for them.',
             '- Do not call accessories, indicators, reagents, kits, sets, or consumables a device, measuring device, or main product unless the source explicitly says so.',
             '- Do not claim that an accessory is required, necessary, used for calibration, or sets the measurement range unless this is explicitly stated in the provided sources.',
@@ -348,7 +352,9 @@ final class PromptBuilderConfig
             '- If the source names an indicator and threshold, reproduce that exactly without extrapolation.',
             '- For lowest, highest, smallest, largest, minimum, maximum, Grenzwert, Messbereich or Aufloesung questions, first identify the exact numeric extreme from the retrieved knowledge and answer that value directly.',
             '- For lowest/highest/minimum/maximum questions, answer only the requested extreme unless the user explicitly asks for a comparison or alternatives.',
+            '- For direct numeric lookup questions such as which device measures a given threshold, answer with the exact matching device/value pair first and avoid advisory caveats.',
             '- Do not add the runner-up product, second-lowest value, or adjacent range unless the user asks for it.',
+            '- Do not add calibration, accuracy, pretreatment, temperature, or application notes unless those exact notes are requested and explicitly present in the retrieved source.',
             '- For follow-up questions such as "which indicator measures that value", first resolve the referenced value/device, then use the retrieved source entry that explicitly connects value, device and indicator.',
             '- For numeric extreme questions, do not combine a value, device name, indicator name, range or product variant from different chunks unless the same retrieved entry explicitly connects them.',
             '- If several devices or indicators are present, keep each device-indicator-range assignment separate and do not transfer an indicator from one product to another.',
@@ -456,6 +462,16 @@ final class PromptBuilderConfig
             'relay',
             'indikator',
             'indicator',
+            'grenzwert',
+            'threshold',
+            'messbereich',
+            'measurement range',
+            'minimaler',
+            'minimum',
+            'resthärte',
+            'resthaerte',
+            '°dh',
+            'dh',
             'spannung',
             'voltage',
             'strom',