zsh: Preserve 5000 lines of history

This used to be far longer - I don't know when it changed :( augh

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1711133180,
-        "narHash": "sha256-WJOahf+6115+GMl3wUfURu8fszuNeJLv9qAWFQl3Vmo=",
+        "lastModified": 1711915616,
+        "narHash": "sha256-co6LoFA+j6BZEeJNSR8nZ4oOort5qYPskjrDHBaJgmo=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "1c2c5e4cabba4c43504ef0f8cc3f3dfa284e2dbb",
+        "rev": "820be197ccf3adaad9a8856ef255c13b6cc561a6",
         "type": "github"
       },
       "original": {
@@ -22,11 +22,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1711163522,
-        "narHash": "sha256-YN/Ciidm+A0fmJPWlHBGvVkcarYWSC+s3NTPk/P+q3c=",
+        "lastModified": 1711703276,
+        "narHash": "sha256-iMUFArF0WCatKK6RzfUJknjem0H9m4KgorO/p3Dopkk=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "44d0940ea560dee511026a53f0e2e2cde489b4d4",
+        "rev": "d8fe5e6c92d0d190646fb9f1056741a229980089",
         "type": "github"
       },
       "original": {

home/prompt.nix

@@ -20,6 +20,7 @@ in
     history = {
       ignoreAllDups = true;
       ignoreSpace = true;
+      size = 5000;
     };
 
     # Common plugins.