Adopt UAPF v2.0.0 cornerstone naming: .bpmn.xml/.dmn.xml/.cmmn.xml -> .bpmn/.dmn/.cmmn [scope-3 3/3]

Renames all 5 cornerstone files to the OMG-ecosystem extensions required
by UAPF-specification v2.0.0, and updates every internal reference:

- uapf.yaml (manifest cornerstone paths + decision refs)
- resources/mappings.yaml (endpoint + usesDecision refs)
- processgit.mcp.yaml (MCP source paths)
- processgit.viewer.json (x2: package + examples)
- cmmn/vertesanas-lieta.cmmn (processTask processRef -> DMN files)
- README.md, docs/source-reference.md, agent.chat.yaml (documentation)

Completes the scope-3 conformance pass for AI-Sandb-Evaluation:
v2.1.0 diagram interchange (CMMN + 3x DMN, prior commits) + v2.0.0 naming.
File contents otherwise unchanged.

processes/L4/vdaa.mi.sandbox.atlase/dmn/03-trl-vertejums.dmn

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<definitions xmlns="https://www.omg.org/spec/DMN/20191111/MODEL/"
+             id="Definitions_TRL"
+             name="TRL līmeņu pārvēršana 0-5 vērtējumā"
+             namespace="https://processgit.org/VDAA/mi-sandbox-atlase/dmn/trl"
+             xmlns:dmndi="https://www.omg.org/spec/DMN/20191111/DMNDI/"
+             xmlns:dc="http://www.omg.org/spec/DMN/20180521/DC/"
+             xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/">
+
+  <!-- Nolikuma 2.pielikums: MI sistēmas gatavības līmeņi -->
+  <inputData id="In_TRL" name="trlLevel"/>
+
+  <decision id="Decision_TRLMapping" name="TRLMapping">
+    <variable name="readinessRatingFromTRL" typeRef="number"/>
+    <informationRequirement id="req_Decision_TRLMapping_1"><requiredInput href="#In_TRL"/></informationRequirement>
+
+    <decisionTable id="DT_TRL" hitPolicy="UNIQUE">
+      <input id="TRL_In"><inputExpression typeRef="number"><text>trlLevel</text></inputExpression></input>
+      <output id="TRL_Score" name="score" typeRef="number"/>
+      <output id="TRL_Label" name="label" typeRef="string"/>
+      <output id="TRL_Sandbox" name="sandboxReadiness" typeRef="string"/>
+
+      <rule id="TRL_R1">
+        <inputEntry><text>[1..2]</text></inputEntry>
+        <outputEntry><text>0</text></outputEntry>
+        <outputEntry><text>"Pamatprincipu novērojumi / formulēta koncepcija"</text></outputEntry>
+        <outputEntry><text>"Par agru regulatīvai videi"</text></outputEntry>
+      </rule>
+      <rule id="TRL_R2">
+        <inputEntry><text>[3..4]</text></inputEntry>
+        <outputEntry><text>2</text></outputEntry>
+        <outputEntry><text>"Koncepcijas pārbaude / validācija laboratorijā"</text></outputEntry>
+        <outputEntry><text>"Ierobežota gatavība"</text></outputEntry>
+      </rule>
+      <rule id="TRL_R3">
+        <inputEntry><text>5</text></inputEntry>
+        <outputEntry><text>3</text></outputEntry>
+        <outputEntry><text>"Validācija mākslīgi radītā vidē"</text></outputEntry>
+        <outputEntry><text>"Minimālais briedums pilotēšanai"</text></outputEntry>
+      </rule>
+      <rule id="TRL_R4">
+        <inputEntry><text>[6..7]</text></inputEntry>
+        <outputEntry><text>4</text></outputEntry>
+        <outputEntry><text>"Demonstrācija mākslīgi radītā / reālā vidē"</text></outputEntry>
+        <outputEntry><text>"Laba gatavība testēšanai"</text></outputEntry>
+      </rule>
+      <rule id="TRL_R5">
+        <inputEntry><text>[8..9]</text></inputEntry>
+        <outputEntry><text>5</text></outputEntry>
+        <outputEntry><text>"Sistēma pabeigta un pārbaudīta / ekspluatācijā"</text></outputEntry>
+        <outputEntry><text>"Pilna gatavība; regulatīvā vide atbilstības/uzraudzības jautājumiem"</text></outputEntry>
+      </rule>
+    </decisionTable>
+  </decision>
+
+  <dmndi:DMNDI>
+    <dmndi:DMNDiagram id="DMNDiagram_1">
+      <dmndi:DMNShape id="DMNShape_Decision_TRLMapping" dmnElementRef="Decision_TRLMapping">
+        <dc:Bounds x="160" y="80" width="180" height="80"/>
+      </dmndi:DMNShape>
+      <dmndi:DMNShape id="DMNShape_In_TRL" dmnElementRef="In_TRL">
+        <dc:Bounds x="160" y="240" width="180" height="45"/>
+      </dmndi:DMNShape>
+      <dmndi:DMNEdge id="DMNEdge_req_Decision_TRLMapping_1" dmnElementRef="req_Decision_TRLMapping_1">
+        <di:waypoint x="250" y="240"/>
+        <di:waypoint x="250" y="160"/>
+      </dmndi:DMNEdge>
+    </dmndi:DMNDiagram>
+  </dmndi:DMNDI>
+</definitions>