feat: regenerate index files

Author: yoshi-automation

discovery/chat-v1.json

@@ -1535,7 +1535,7 @@
       }
     }
   },
-  "revision": "20251207",
+  "revision": "20251215",
   "rootUrl": "https://chat.googleapis.com/",
   "schemas": {
     "AccessSettings": {
@@ -5293,9 +5293,9 @@
           ],
           "enumDescriptions": [
             "Reserved.",
-            "Named spaces that support message threads. When users respond to a message, they can reply in-thread, which keeps their response in the context of the original message.",
+            "Spaces that support message threads. When users respond to a message, they can reply in-thread, which keeps their response in the context of the original message.",
             "Named spaces where the conversation is organized by topic. Topics and their replies are grouped together.",
-            "Direct messages (DMs) between two people and group conversations between 3 or more people."
+            "Spaces that don't support message threading. This space threading state is only used for special cases including: * Continuous meeting chat where threading is intentionally turned off. * Legacy group conversations that were created prior to 2022."
           ],
           "readOnly": true,
           "type": "string"

discovery/containeranalysis-v1alpha1.json

@@ -1452,7 +1452,7 @@
       }
     }
   },
-  "revision": "20251203",
+  "revision": "20251212",
   "rootUrl": "https://containeranalysis.googleapis.com/",
   "schemas": {
     "AnalysisCompleted": {
@@ -4909,12 +4909,14 @@
           "enum": [
             "NONE",
             "SHA256",
-            "GO_MODULE_H1"
+            "GO_MODULE_H1",
+            "DIRSUM_SHA256"
           ],
           "enumDescriptions": [
             "No hash requested.",
             "A sha256 hash.",
-            "Dirhash of a Go module's source code which is then hex-encoded."
+            "Dirhash of a Go module's source code which is then hex-encoded.",
+            "Dirsum hash of the downloaded artifact files."
           ],
           "type": "string"
         },

discovery/containeranalysis-v1beta1.json

@@ -1771,7 +1771,7 @@
       }
     }
   },
-  "revision": "20251203",
+  "revision": "20251212",
   "rootUrl": "https://containeranalysis.googleapis.com/",
   "schemas": {
     "AliasContext": {
@@ -5284,13 +5284,15 @@
             "HASH_TYPE_UNSPECIFIED",
             "SHA256",
             "GO_MODULE_H1",
-            "SHA512"
+            "SHA512",
+            "DIRSUM_SHA256"
           ],
           "enumDescriptions": [
             "Unknown.",
             "A SHA-256 hash.",
             "Dirhash of a Go module's source code which is then hex-encoded. See b/244466565 and https://github.com/in-toto/attestation/pull/108.",
-            "A SHA-512 hash."
+            "A SHA-512 hash.",
+            "A Dirsum SHA-256 hash."
           ],
           "type": "string"
         },