kusanagi/ollama: double default context, add 1h keep-alive

The 12B model at 32k context uses only 7.7 GB of the 7900 XT's 20 GB, so
there is ample VRAM headroom for 64k with the q8_0 KV cache — agentic
coding tools are context-hungry and 32k is the practical bottleneck.
The keep-alive stops the default 5-minute idle unload from adding a
reload stall to every resumed session on a single-user workstation.

Update flake to get newer packages.

Assisted-by: Claude Code:claude-fable-5

1 files changed, 3 insertions, 3 deletions

diff --git a/flake.lock b/flake.lock
index 83697dc..7469487 100644
--- a/flake.lock
+++ b/flake.lock
@@ -43,11 +43,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1784280462,
-        "narHash": "sha256-DtoqIqM7VkR6NxAkcLpMwmi02USwWb3JdmNGLyhthc0=",
+        "lastModified": 1785734586,
+        "narHash": "sha256-ODZkEK9Gy50yg6h98u7KkitZ3oc/uuTFK00bh1CRdNA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "293d6abedf0478e681a4dfcfcb35b30fc796a32f",
+        "rev": "531670d871c0e29724a02f3cbcac170adc65b58c",
         "type": "github"
       },
       "original": {