add new speaker

Author: akelity

public/images/profiles/stephane-karagulmez.webp

@@ -215,7 +215,7 @@
         "time": "17:00 - 17:35",
         "sessions": [
           { "talkId": "platform-engineering-and-ai-agents", "trackId": "track1" },
-          { "talkId": "green-prompting-designing-ai-interactions-with-sustainability-in-mind", "trackId": "track2" }
+          { "talkId": "east-west-mtls-no-sidecars", "trackId": "track2" }
         ]
       },
       {

src/config/agenda.json

@@ -50,7 +50,7 @@
     "francesco-canovai",
     "niccolo-fei",
     "dillon-barry",
-    "valeria-salis",
+    "stephane-karagulmez",
     "marco-pernigo",
     "jacopo-nardiello"
   ],

src/config/editions/2026.json

@@ -0,0 +1,11 @@
+---
+id: "stephane-karagulmez"
+name: "Stephane Karagulmez"
+role: "Senior Sales engineer"
+company: "Isovalent by Cisco"
+companyUrl: "https://isovalent.com/"
+image: "/images/profiles/stephane-karagulmez.webp"
+linkedin: "https://www.linkedin.com/in/stephane-karagulmez-b9699410a/"
+---
+
+Stephane is a Senior Solution Architect at Isovalent, with deep expertise in Kubernetes and networking. With a background spanning from developer to Google Cloud Sales Engineer and Kubernetes Practice Lead, Stephne has built a career at the intersection of technology and business solutions. At Isovalent, they design complex architectures while sharing knowledge through public speaking and writing. A passionate advocate for making tech accessible, Stephane blends technical expertise with a customer-focused approach to drive impactful solutions.

src/config/profiles/stephane-karagulmez.md

@@ -0,0 +1,15 @@
+---
+id: east-west-mtls-no-sidecars
+title: 'East-West mTLS, no sidecars: Ztunnel on Cilium 1.19'
+type: talk
+speakerIds:
+  - stephane-karagulmez
+tags:
+  - ENG
+level: Intermediate
+image: ''
+video: ''
+slide: ''
+---
+
+Cilium 1.19 adds native integration with ztunnel, a per-node proxy that transparently encrypts and authenticates TCP traffic between enrolled workloads. No application changes and no sidecar injection. Opt in per namespace; cilium-agent handles enrollment, certificates, and discovery