fix: adjust signature encoding format

Resolves authentication flow edge case.

Cargo.lock

@@ -2650,7 +2650,6 @@ dependencies = [
  "futures-util",
  "hmac",
  "mockito",
- "polymarket-rs-client",
  "proptest",
  "rand 0.8.5",
  "reqwest",
@@ -2671,28 +2670,6 @@ dependencies = [
  "uuid",
 ]
 
-[[package]]
-name = "polymarket-rs-client"
-version = "0.1.1"
-dependencies = [
- "alloy-primitives",
- "alloy-signer",
- "alloy-signer-local",
- "alloy-sol-types",
- "anyhow",
- "base64",
- "hmac",
- "rand 0.8.5",
- "reqwest",
- "rust_decimal",
- "serde",
- "serde-json-fmt",
- "serde_json",
- "sha1",
- "sha2",
- "ureq",
-]
-
 [[package]]
 name = "potential_utf"
 version = "0.1.4"
@@ -3206,9 +3183,7 @@ version = "0.23.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "533f54bc6a7d4f647e46ad909549eda97bf5afc1585190ef692b4286b198bd8f"
 dependencies = [
- "log",
  "once_cell",
- "ring",
  "rustls-pki-types",
  "rustls-webpki",
  "subtle",
@@ -3360,17 +3335,6 @@ dependencies = [
  "serde_derive",
 ]
 
-[[package]]
-name = "serde-json-fmt"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4a33b7a5f52a26d520099339add40c48baf2e5ada194c8cc1b18cafa2b5e419"
-dependencies = [
- "serde",
- "serde_json",
- "smartstring",
-]
-
 [[package]]
 name = "serde_core"
 version = "1.0.228"
@@ -3541,17 +3505,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "smartstring"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fb72c633efbaa2dd666986505016c32c3044395ceaf881518399d2f4127ee29"
-dependencies = [
- "autocfg",
- "static_assertions",
- "version_check",
-]
-
 [[package]]
 name = "socket2"
 version = "0.5.10"
@@ -4181,25 +4134,6 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
-[[package]]
-name = "ureq"
-version = "2.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02d1a66277ed75f640d608235660df48c8e3c19f3b4edb6a263315626cc3c01d"
-dependencies = [
- "base64",
- "encoding_rs",
- "flate2",
- "log",
- "once_cell",
- "rustls",
- "rustls-pki-types",
- "serde",
- "serde_json",
- "url",
- "webpki-roots 0.26.11",
-]
-
 [[package]]
 name = "url"
 version = "2.5.7"
@@ -4390,24 +4324,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "webpki-roots"
-version = "0.26.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "521bc38abb08001b01866da9f51eb7c5d647a19260e00054a8c7fd5f9e57f7a9"
-dependencies = [
- "webpki-roots 1.0.4",
-]
-
-[[package]]
-name = "webpki-roots"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2878ef029c47c6e8cf779119f20fcf52bde7ad42a731b2a304bc221df17571e"
-dependencies = [
- "rustls-pki-types",
-]
-
 [[package]]
 name = "widestring"
 version = "1.2.1"