markdown-vault-mcp: point STATE_PATH at a file, not the PVC mount dir

Fixes IsADirectoryError on startup when the app tried to atomically
write its change-tracking state to /data/state itself.

clusters/base/apps/vaultwarden/secret.enc.yaml

@@ -4,20 +4,20 @@ metadata:
     name: vaultwarden-secrets
     namespace: vaultwarden
 stringData:
-    #ENC[AES256_GCM,data:p7K3yTpcx9TMEBnrHJBCLDzkkYBU2bvffvDXtfbn+hZYhhcoIzEhGJhEJbyYNSsk2ygeHyr5Y/88,iv:jUsOYpJUn5hb+rtfV2/zGfcpVLztfc7XwPA33OSr74k=,tag:WCfS+XSFvuawdIcNcNEsHg==,type:comment]
-    ADMIN_TOKEN: ENC[AES256_GCM,data:HJvJMAxwdn01Fw5dBYFmViJ7fxDbA186CaDhRMNlW03H82X5xFTb6UAyhgy6ltkTVU4Pk94kAg0bRhfxQM3/t+5cl99eDb6Ia4paYiyJpAhMd23FUTI9ec1q24FHJhnh6acmujR+H5YNcEW+hzXLTnOoOTDnNg==,iv:MfvMJVp9X40P/kSEmKC+DFTyvNWal1erV7kya3fzo2g=,tag:Zqp2Ezipl5KN+NLqXFjroQ==,type:str]
+    #ENC[AES256_GCM,data:1RaQSBQOKecKVraM87mUGcbWoXAR4N/lV/gffaulL12qE8KZKtJnY0eDCFvc4mVpcwS8jtcGW4RJ,iv:tZJw9MyFPalrIqUciWhdMK7Qoy6vWQOCvFk9hB9zr2A=,tag:dA6T13JixkLtFxkyqWOlWg==,type:comment]
+    ADMIN_TOKEN: ENC[AES256_GCM,data:Zx4CACkvjABR7cJw6cKqq8I4wjWnsPhfvZe76D7QzROO2xyHfSN1He3yZl+LhhFG3sDWnixwrM+BK02ySVN+dCsoM05uZuwppMTVR4QiNqtKvoG5Yi2IibkdIkvwkV5YFWq1p7W2XOrG66WR6LoZugLPAKzucA==,iv:wL6MxrYSHXQArjdDDLbTjcoWXqmTL+hu6Ww4A00swbY=,tag:wDz1H1TvgalFFYnqKNGnuA==,type:str]
 sops:
     age:
         - recipient: age109zta6l0cwpkxn5wek82kvauxn6yqrq80rsz4mvu5atdnpcn9pusuvnqk5
           enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB4ZENXVncrOXp1MW9yWU52
-            RXpJRlZiYWVWd0NKSHBDNmt0Sm9qUXZhUndrCnFMeDczMy9BM1dJeS9CenlpcDVl
-            N3A1WnF1S3h5c29GZDFRTUN2KzREYzQKLS0tIGFLNTdlM1pTNWNCYjM4dWZKcXp1
-            Rm5DYjNkTkVXZ0YvdHpYajAvSUgyU00KFUHizWnegcBsUjylO8iogAA5zDYXzjKR
-            Cpr6ujEuqqfismuocg7WxGChl6d0/nVVyXZ3ywNArMHfFOh/TCVsSQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBWRkx6TDJnQTUrWjI1Qk5i
+            cTNreTV6NndpQlF5STZFT0UzZlNrTEdTdFZjClNpSmFSdWQ5L2gxb0V5QVdqbWVP
+            cGJoZnUrakVMNHo3YnJBaWJON2RKN0kKLS0tIHVseExJM2FqVHNyZzMvdUNzL3RZ
+            YXNxWXFydGZTS29COS91bzNsUmQ2a2sKVaV97We4eoOVkOp9nxzNFPObgO1dOrl9
+            rWor0u/KWuiKmzoTouDaSFqQazQcwgJllEtEeX2+Qggy46jPQJY3Kg==
             -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2026-08-26T10:20:23Z"
-    mac: ENC[AES256_GCM,data:NCyhZVHTqyb6TxxzVlNIl3phYTcUjR3wEyWQW8EwRAAjnmbM2iP1LbN9vJYPxU9WT0ZPZFhOLTCuoQTbpbdpk481olwRapCavofFmJHbSFVcLKiglT/GTJ8aPCmCVn8vxsL31Arw1NFj/sPORxqfqj4NvR7TwxhG9tpAbO+K/Yw=,iv:JZ2sCO+oAtwxHE5zfQt8ytzcF/eZOKJyn9nMufDc0i8=,tag:jqwfrwdOKOLZacrhwb1mEg==,type:str]
+    lastmodified: "2026-08-26T10:20:28Z"
+    mac: ENC[AES256_GCM,data:5BOBITBATT+RkPX0vuNyQR2amMMcUSxZQi88RZ5ZxOvcBvIpVFbb7Xutu/+xJq7K9v2SK4x/jONpZOfHKsQ5ZAB9T9AgY5aLgJxiwWSqAKlwG7c10Ex1cr7FI6YDaBNb0VKj1Eom738gOWRT49EtZ98LEdSmvDOC9y9sGo103v8=,iv:NU8yqHfSfz6KOBavjzYFaYUoj4F7dlnoOQ8E0Jmv2CY=,tag:LwpD+pTG9g+PCiSEA4BMeA==,type:str]
     encrypted_regex: ^(data|stringData)$
     version: 3.11.0