GRM-139: feat: adopt documentation-as-code enhancements from devx

docs/tech/architecture.md

@@ -22,7 +22,7 @@ The Ansible role handles all remote state: user creation, package installation,
 
 ## Component Tree
 
-```
+```text
 grm install <host>
   └── RunnerManager.install()
       └── ansible-playbook ansible/install-runner.yml
@@ -37,7 +37,7 @@ grm install <host>
 
 The Ansible role task execution order (from `AGENTS.md`):
 
-```
+```text
 main.yml → systemd_check → user_setup → rootless_docker → install_runner → prune → healthcheck → integration_test
 ```
 

docs/tech/ci-cd-workflow.md

@@ -36,7 +36,7 @@ git checkout -b GRM-N-short-description
 
 Branch commits use conventional commit format (no `GRM-N:` prefix):
 
-```
+```text
 feat: add new feature
 fix: resolve bug
 docs: update README

docs/tech/contributing.md

@@ -35,7 +35,7 @@
 
 Branch commits use conventional commit format (no `GRM-N:` prefix):
 
-```
+```text
 feat: add new feature
 fix: resolve bug
 docs: update README
@@ -99,7 +99,7 @@ git checkout -b GRM-N-short-description
 
 Branch commits use conventional commit format (no `GRM-N:` prefix):
 
-```
+```text
 feat: add new feature
 fix: resolve bug
 docs: update README
@@ -195,7 +195,7 @@ make workflow-check # Static lint + dry-run of workflow YAML
 
 ## Ansible Role Conventions
 
-```
+```text
 main.yml → systemd_check → user_setup → rootless_docker → install_runner → prune → integration_test
 ```
 

docs/tech/development-setup.md

@@ -2,7 +2,7 @@
 
 ## Project Structure
 
-```
+```text
 .
 ├── src/grm/      # Python CLI source
 │   ├── cli.py                     # Click commands