feat: blossom media uploads

fix: file extensions in URLs

Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -2016,6 +2016,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "mime2ext"
+version = "0.1.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "515a63dc9666c865e848b043ab52fe9a5c713ae89cde4b5fbaae67cfd614b93a"
+
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -2989,6 +2995,7 @@ dependencies = [
  "hex",
  "libc",
  "log",
+ "mime2ext",
  "nostr",
  "pretty_env_logger",
  "reqwest",