feat: add GCP Vertex AI platform as provider (#1364)

Signed-off-by: Uddhav Kambli <uddhav@kambli.net>

Cargo.lock

@@ -230,9 +230,9 @@ dependencies = [
 
 [[package]]
 name = "async-trait"
-version = "0.1.85"
+version = "0.1.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f934833b4b7233644e5848f235df3f57ed8c80f1528a26c3dfa13d2147fa056"
+checksum = "644dd749086bf3771a2fbc5f256fdb982d53f011c7d5d560304eafeecebce79d"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1699,6 +1699,12 @@ version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77c90badedccf4105eca100756a0b1289e191f6fcbdadd3cee1d2f614f97da8f"
 
+[[package]]
+name = "downcast"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1435fa1053d8b2fbbe9be7e97eca7f33d37b28409959813daefc1446a14247f1"
+
 [[package]]
 name = "dyn-clone"
 version = "1.0.17"
@@ -1883,6 +1889,12 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fragile"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c2141d6d6c8512188a7891b4b01590a45f6dac67afb4f255c4124dbb86d4eaa"
+
 [[package]]
 name = "futures"
 version = "0.3.31"
@@ -2149,10 +2161,12 @@ dependencies = [
  "futures",
  "include_dir",
  "indoc",
+ "jsonwebtoken",
  "keyring",
  "lazy_static",
  "mcp-client",
  "mcp-core",
+ "mockall",
  "nanoid",
  "once_cell",
  "paste",
@@ -2571,7 +2585,7 @@ dependencies = [
  "http 1.2.0",
  "hyper 1.6.0",
  "hyper-util",
- "rustls 0.23.21",
+ "rustls 0.23.23",
  "rustls-native-certs 0.8.1",
  "rustls-pki-types",
  "tokio",
@@ -3028,6 +3042,21 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "jsonwebtoken"
+version = "9.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a87cc7a48537badeae96744432de36f4be2b4a34a05a5ef32e9dd8a1c169dde"
+dependencies = [
+ "base64 0.22.1",
+ "js-sys",
+ "pem",
+ "ring",
+ "serde",
+ "serde_json",
+ "simple_asn1",
+]
+
 [[package]]
 name = "keyring"
 version = "3.6.1"
@@ -3367,6 +3396,32 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "mockall"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39a6bfcc6c8c7eed5ee98b9c3e33adc726054389233e201c95dab2d41a3839d2"
+dependencies = [
+ "cfg-if",
+ "downcast",
+ "fragile",
+ "mockall_derive",
+ "predicates",
+ "predicates-tree",
+]
+
+[[package]]
+name = "mockall_derive"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25ca3004c2efe9011bd4e461bd8256445052b9615405b4f7ea43fc8ca5c20898"
+dependencies = [
+ "cfg-if",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
 [[package]]
 name = "monostate"
 version = "0.1.13"
@@ -3739,6 +3794,16 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df94ce210e5bc13cb6651479fa48d14f601d9858cfe0467f43ae157023b938d3"
 
+[[package]]
+name = "pem"
+version = "3.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38af38e8470ac9dee3ce1bae1af9c1671fffc44ddfd8bd1d0a3445bf349a8ef3"
+dependencies = [
+ "base64 0.22.1",
+ "serde",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.1"
@@ -3941,6 +4006,32 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "predicates"
+version = "3.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a5d19ee57562043d37e82899fade9a22ebab7be9cef5026b07fda9cdd4293573"
+dependencies = [
+ "anstyle",
+ "predicates-core",
+]
+
+[[package]]
+name = "predicates-core"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "727e462b119fe9c93fd0eb1429a5f7647394014cf3c04ab2c0350eeb09095ffa"
+
+[[package]]
+name = "predicates-tree"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72dd2d6d381dfb73a193c7fca536518d7caee39fc8503f74e7dc0be0531b425c"
+dependencies = [
+ "predicates-core",
+ "termtree",
+]
+
 [[package]]
 name = "prettyplease"
 version = "0.2.29"
@@ -4063,7 +4154,7 @@ dependencies = [
  "quinn-proto",
  "quinn-udp",
  "rustc-hash 2.1.0",
- "rustls 0.23.21",
+ "rustls 0.23.23",
  "socket2",
  "thiserror 2.0.11",
  "tokio",
@@ -4081,7 +4172,7 @@ dependencies = [
  "rand",
  "ring",
  "rustc-hash 2.1.0",
- "rustls 0.23.21",
+ "rustls 0.23.23",
  "rustls-pki-types",
  "slab",
  "thiserror 2.0.11",
@@ -4393,7 +4484,7 @@ dependencies = [
  "percent-encoding",
  "pin-project-lite",
  "quinn",
- "rustls 0.23.21",
+ "rustls 0.23.23",
  "rustls-pemfile 2.2.0",
  "rustls-pki-types",
  "serde",
@@ -4514,9 +4605,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.21"
+version = "0.23.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f287924602bf649d949c63dc8ac8b235fa5387d394020705b80c4eb597ce5b8"
+checksum = "47796c98c480fce5406ef69d1c76378375492c3b0a0de587be0c1d9feb12f395"
 dependencies = [
  "once_cell",
  "ring",
@@ -4977,6 +5068,18 @@ dependencies = [
  "quote",
 ]
 
+[[package]]
+name = "simple_asn1"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "297f631f50729c8c99b84667867963997ec0b50f32b2a7dbcab828ef0541e8bb"
+dependencies = [
+ "num-bigint",
+ "num-traits",
+ "thiserror 2.0.11",
+ "time",
+]
+
 [[package]]
 name = "siphasher"
 version = "1.0.1"
@@ -5268,6 +5371,12 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "termtree"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f50febec83f5ee1df3015341d8bd429f2d1cc62bcba7ea2076759d315084683"
+
 [[package]]
 name = "test-case"
 version = "3.3.1"
@@ -5537,7 +5646,7 @@ version = "0.26.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f6d0975eaace0cf0fcadee4e4aaa5da15b5c079146f2cffb67c113be122bf37"
 dependencies = [
- "rustls 0.23.21",
+ "rustls 0.23.23",
  "tokio",
 ]
 
@@ -6767,7 +6876,7 @@ dependencies = [
  "hyper-util",
  "log",
  "percent-encoding",
- "rustls 0.23.21",
+ "rustls 0.23.23",
  "rustls-pemfile 2.2.0",
  "seahash",
  "serde",