feat(linter): add GL046-GL049 rules, AND-group support, and GL032 fix

- GL046: validate image/service pull_policy values (always, if-not-present, never)
- GL047: error when a variables.options default value is not in the options list
- GL048: error on unrecognised trigger.forward keys
- GL049: validate rules[n].allow_failure (bool or {exit_codes:} map)
- Parse and evaluate workflow.rules/job.rules nested-array AND-groups; crash
  on !!seq nodes is fixed; all members of a group must match for it to fire
- Add workflow.name and workflow.auto_cancel fields to Workflow struct
- Fix GL032 false positive: variables declared in any workflow rule's variables:
  block no longer trigger an undeclared-variable warning in sibling workflow
  rule if: expressions
- Add Windows ARM64 release build target (task build-windows-arm64)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

testdata/keywords_invalid.yml

@@ -2,6 +2,13 @@ stages:
   - build
   - test
 
+variables:
+  DEPLOY_ENV:
+    value: canary             # ERROR: not listed in options
+    options:
+      - staging
+      - production
+
 workflow:
   rules:
     - if: '$CI_PIPELINE_SOURCE == "push"'
@@ -126,3 +133,50 @@ bad-rule-when-job:
   rules:
     - if: '$CI_MERGE_REQUEST_ID'
       when: sometimes         # ERROR: invalid rules[0].when
+
+bad-pull-policy-job:
+  stage: build
+  script:
+    - echo hello
+  image:
+    name: alpine
+    pull_policy: on-demand    # ERROR: invalid pull_policy value
+
+bad-pull-policy-service-job:
+  stage: build
+  script:
+    - echo hello
+  services:
+    - name: postgres:15
+      pull_policy: lazy       # ERROR: invalid service pull_policy value
+
+bad-trigger-forward-job:
+  trigger:
+    project: mygroup/myproject
+    forward:
+      all_variables: true     # ERROR: unrecognised trigger.forward key
+
+bad-trigger-forward-key2-job:
+  trigger:
+    include:
+      - artifact: child.yml
+        job: build
+    forward:
+      inherit: false          # ERROR: unrecognised trigger.forward key
+
+bad-rules-allow-failure-job:
+  stage: build
+  script:
+    - echo hello
+  rules:
+    - if: $CI_COMMIT_BRANCH
+      allow_failure: maybe    # ERROR: invalid rules[0].allow_failure value
+
+bad-rules-allow-failure-map-job:
+  stage: build
+  script:
+    - echo hello
+  rules:
+    - if: $CI_COMMIT_BRANCH
+      allow_failure:
+        codes: [1]            # ERROR: map missing exit_codes key

testdata/keywords_valid.yml

@@ -15,12 +15,19 @@ default:
 
 variables:
   GO_VERSION: "1.26"
+  DEPLOY_ENV:
+    value: staging
+    options:
+      - staging
+      - production
+      - review
 
 build-job:
   stage: build
   image:
     name: golang:1.26
     entrypoint: [""]
+    pull_policy: if-not-present
   script:
     - go build ./...
   artifacts:
@@ -72,6 +79,24 @@ release-job:
     action: start
   when: on_success
 
+.trigger-valid:
+  trigger:
+    include:
+      - artifact: child.yml
+        job: build
+    forward:
+      pipeline_variables: true
+      yaml_variables: false
+
+.rules-allow-failure-valid:
+  script: echo ok
+  rules:
+    - if: $CI_COMMIT_BRANCH
+      allow_failure: true
+    - if: $CI_COMMIT_TAG
+      allow_failure:
+        exit_codes: [1, 2]
+
 .template:
   before_script:
     - echo "before"

testdata/nested_rules.yml

@@ -0,0 +1,31 @@
+---
+# Tests that workflow.rules and job.rules accept the nested-array (AND-group)
+# form where each outer entry can itself be a sequence of rule conditions.
+workflow:
+  name: "${PIPELINE_NAME}"
+  auto_cancel:
+    on_new_commit: interruptible
+  rules:
+  - if: "$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH"
+    variables:
+      PIPELINE_NAME: "main"
+  - - if: "$CI_PIPELINE_SOURCE == 'push' && $CI_COMMIT_BRANCH =~ /^feat\\///"
+      variables:
+        PIPELINE_NAME: "feature"
+  - - if: "$CI_COMMIT_TAG"
+    - if: "$DEPLOY"
+      variables:
+        PIPELINE_NAME: "deploy"
+
+variables:
+  DEPLOY: "false"
+
+build:
+  stage: build
+  script: echo building
+  rules:
+  - if: "$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH"
+  - - if: "$CI_PIPELINE_SOURCE == 'push'"
+      allow_failure: true
+    - if: "$DEPLOY"
+      when: manual

testdata/variable_refs.yml

@@ -17,6 +17,10 @@ workflow:
     - if: '$CI_COMMIT_BRANCH == "main"'
       variables:
         DEPLOY_TARGET: "production"
+        WORKFLOW_FLAG: "true"
+    # workflow rule referencing a variable set by a sibling rule's variables: — GL032 must not fire
+    - if: '$WORKFLOW_FLAG == "true"'
+      when: always
     - when: always
 
 build: