chore: adapt CI workflows for Gitea and uwu.lc deployment

- Update all workflow runners from blacksmith to ubuntu-latest
- Configure release-server.yaml for Gitea container registry (git.i5.wtf)
- Change trigger branch from canary to uwu
- Add NOTES.md documenting branch setup and changes

.github/workflows/ci.yaml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   typecheck:
-    runs-on: blacksmith-8vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     timeout-minutes: 25
     steps:
       - name: Checkout code
@@ -32,7 +32,7 @@ jobs:
           TURBO_TEAM: team_fluxer
 
   test:
-    runs-on: blacksmith-8vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     timeout-minutes: 25
     steps:
       - name: Checkout code
@@ -59,7 +59,7 @@ jobs:
           TURBO_TEAM: team_fluxer
 
   gateway:
-    runs-on: blacksmith-8vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     timeout-minutes: 25
     steps:
       - name: Checkout code
@@ -93,7 +93,7 @@ jobs:
           FLUXER_CONFIG: ../config/config.test.json
 
   knip:
-    runs-on: blacksmith-8vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     timeout-minutes: 25
     steps:
       - name: Checkout code
@@ -119,7 +119,7 @@ jobs:
           TURBO_TEAM: team_fluxer
 
   ci-scripts:
-    runs-on: blacksmith-8vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     timeout-minutes: 25
     steps:
       - name: Checkout code