ci: Upgrade to latest taskbot

Both help with debugging and troubleshooting.  Also allow setting
RUST_LOG for manual runs.

.forgejo/script/taskbot.nix

@@ -4,10 +4,10 @@ let
     url = "https://github.com/NixOS/nixpkgs/archive/1267bb4920d0fc06ea916734c11b0bf004bbe17e.tar.gz";
     sha256 = "sha256:0sjac485rc346hpj5dvidh3lqdlq5lp7y7glicibgxqizrb90dpc";
   };
-  # Tracking TaskBot main as of 2026-03-02.
+  # Tracking TaskBot main as of 2026-03-05.
   taskbotSrc = fetchTarball {
-    url = "https://git.fa-fo.de/rahix/TaskBot/archive/0978ed7b5e86589728d538f0fe72e1a86018b0a5.tar.gz";
-    sha256 = "sha256:0x9bw0vbhl8x83jik40qv4ylvp29dl2ixzrkn3l43f5hym5fqjca";
+    url = "https://git.fa-fo.de/rahix/TaskBot/archive/e0b0ae4bc86c70b61539c8c88a0b1ab8a5816ac3.tar.gz";
+    sha256 = "sha256:0vwqyqfvz84cqifn1v54xd74di9l3n1wrjqz8jhgz3h69366w7hj";
   };
 
 in with import nixpkgsSrc {}; let

.forgejo/workflows/taskbot.yml

@@ -2,9 +2,15 @@ on:
   schedule:
     - cron: '0 8,18 * * *'
   # For testing:
-  # push:
-  #   branches:
-  #     - 'poc'
+  push:
+    branches:
+      - 'ci-staging'
+  workflow_dispatch:
+    inputs:
+      RUST_LOG:
+        description: 'RUST_LOG environment variable for log filter'
+        type: string
+        required: false
 
 jobs:
   build:
@@ -12,4 +18,4 @@ jobs:
     steps:
       - uses: https://code.forgejo.org/actions/checkout@v4
       - name: Run TaskBot
-        run: nix-shell .forgejo/script/taskbot.nix --run "fafo-taskbot"
+        run: RUST_LOG="${{ inputs.RUST_LOG || 'info' }}" nix-shell .forgejo/script/taskbot.nix --run "fafo-taskbot"