docs: clarify thesis runtime model and teaching sequence

docs/thesis/references.bib

@@ -10,7 +10,7 @@
   title = {Save and publish workflows},
   author = {{n8n}},
   year = {2026},
-  url = {https://docs.n8n.io/build/understand-workflows/save-and-publish-workflows.md},
+  url = {https://docs.n8n.io/build/understand-workflows/save-and-publish-workflows},
   urldate = {2026-09-11}
 }
 
@@ -18,7 +18,7 @@
   title = {View executions for a single workflow},
   author = {{n8n}},
   year = {2026},
-  url = {https://docs.n8n.io/build/understand-workflows/understand-executions/view-executions-for-a-single-workflow.md},
+  url = {https://docs.n8n.io/build/understand-workflows/understand-executions/view-executions-for-a-single-workflow},
   urldate = {2026-09-11}
 }
 
@@ -50,7 +50,7 @@
   title   = {Understand n8n's data structure},
   author  = {{n8n}},
   year    = {2026},
-  url     = {https://docs.n8n.io/build/work-with-data/understand-n8ns-data-structure.md},
+  url     = {https://docs.n8n.io/build/work-with-data/understand-n8ns-data-structure},
   urldate = {2026-09-11}
 }
 
@@ -58,7 +58,7 @@
   title   = {Understand execution order},
   author  = {{n8n}},
   year    = {2026},
-  url     = {https://docs.n8n.io/build/flow-logic/understand-execution-order.md},
+  url     = {https://docs.n8n.io/build/flow-logic/understand-execution-order},
   urldate = {2026-09-11}
 }