Ci/environments cleanups, new envs and master to release naming (Stirling-Tools#7511)

# Description of Changes

Ci/environments cleanups, new envs and master to release naming

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have run `task check` to verify linters, typechecks, and tests
pass
- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#7-testing)
for more details.

Author: Frooodle

.github/config/.files.yaml

@@ -68,7 +68,6 @@ project: &project
 frontend: &frontend
   - *ci
   - frontend/**
-  - .github/workflows/testdriver.yml
   - testing/**
   - docker/**
   - scripts/translations/*.py

.github/workflows/PR-Demo-cleanup.yml

@@ -7,10 +7,6 @@ on:
 permissions:
   contents: read
 
-env:
-  SERVER_IP: ${{ secrets.NEW_VPS_IP }} # Add this to your GitHub secrets
-  CLEANUP_PERFORMED: "false" # Add flag to track if cleanup occurred
-
 jobs:
   cleanup:
     environment: pr-preview

.github/workflows/ai_pr_title_review.yml

@@ -20,6 +20,7 @@ permissions:
 
 jobs:
   build:
+    environment: ci-unsigned
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false

.github/workflows/backend-build.yml

@@ -37,6 +37,7 @@ jobs:
     uses: ./.github/workflows/_runner-pick.yml
 
   playwright-e2e-enterprise:
+    environment: ci-unsigned
     needs: pick
     # Skip on fork PRs / untrusted authors: they have no PREMIUM_KEY_ENTERPRISE,
     # so the suite can't boot premium and would fail. See the header comment.
@@ -309,6 +310,7 @@ jobs:
   # Multi-node regression: builds + seeds the clustered stack (testing/compose/docker-compose-multinode.yml)
   # and runs behave features/multinode. Licence-gated, so it runs after the Playwright job (not in parallel).
   multinode-e2e:
+    environment: ci-unsigned
     needs: [pick, playwright-e2e-enterprise]
     # Nightly cron + manual dispatch only (heavy build), fork-gated for the licence secret.
     if: >-

.github/workflows/build-enterprise.yml

@@ -61,6 +61,7 @@ jobs:
           filters: .github/config/.files.yaml
 
   gradle-cache-prime:
+    environment: ci-unsigned
     name: Prime shared Gradle cache
     needs: [files-changed]
     runs-on: ubuntu-latest

.github/workflows/build.yml

@@ -10,6 +10,7 @@ permissions:
 
 jobs:
   check-licence:
+    environment: ci-unsigned
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner

.github/workflows/check-licence.yml

@@ -11,6 +11,7 @@ permissions:
 
 jobs:
   check-generate-openapi-docs:
+    environment: ci-unsigned
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner

.github/workflows/check-openapi.yml

@@ -13,6 +13,7 @@ permissions:
 
 jobs:
   migration-test:
+    environment: ci-unsigned
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps: