feat(media): use file's sha256 for on-disk name & make directory configurable

In addition, metadata about the file, such as creation time, last access, and
file size, are stored in the database

Cargo.lock

@@ -499,6 +499,7 @@ dependencies = [
  "directories",
  "figment",
  "futures-util",
+ "hex",
  "hickory-resolver",
  "hmac",
  "http 1.1.0",
@@ -528,6 +529,7 @@ dependencies = [
  "serde_json",
  "serde_yaml",
  "sha-1",
+ "sha2",
  "thiserror 1.0.61",
  "thread_local",
  "threadpool",
@@ -1045,6 +1047,12 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
+[[package]]
+name = "hex"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
+
 [[package]]
 name = "hickory-proto"
 version = "0.24.1"