chore: migrate CI to circleci-toolkit 6.0.0 (#1575)

## Summary

- Migrate all 4 CI files from `jerus-org/circleci-toolkit@4.9.5` to
`6.0.0`
- Rename `required_builds_rolling` → `required_builds`
- Rename `common_tests_rolling` → `common_tests`
- Remove `min_rust_version` from jobs that no longer accept it
(including `rust_fuzz_smoke`, `rust_miri`, `test_wasm`)
- Remove orphaned `min_rust_version` pipeline parameter from `audit.yml`

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Author: jerusdp

.circleci/audit.yml

@@ -5,12 +5,7 @@
 version: 2.1
 
 orbs:
-  toolkit: jerus-org/circleci-toolkit@4.9.5
-
-parameters:
-  min_rust_version:
-    type: string
-    default: "1.88"
+  toolkit: jerus-org/circleci-toolkit@6.0.0
 
 workflows:
   audit:
@@ -20,7 +15,6 @@ workflows:
 
       - toolkit/rust_miri:
           name: miri_tests
-          min_rust_version: << pipeline.parameters.min_rust_version >>
           package: "hcaptcha"
           test_args: "--lib"
           skip_tests: >
@@ -35,7 +29,6 @@ workflows:
 
       - toolkit/rust_fuzz_smoke:
           name: fuzz_smoke
-          min_rust_version: << pipeline.parameters.min_rust_version >>
           fuzz_target: "response_parse"
           max_total_time: 60
           fail_on_findings: false

.circleci/config.yml

@@ -10,7 +10,7 @@ parameters:
     default: "1.88"
 
 orbs:
-  toolkit: jerus-org/circleci-toolkit@4.9.5
+  toolkit: jerus-org/circleci-toolkit@6.0.0
 
 # Reusable command to set reproducible-build environment variables.
 commands:
@@ -109,22 +109,19 @@ workflows:
           filters:
             branches:
               only: /pull\/[0-9]+/
-      - toolkit/required_builds_rolling:
+      - toolkit/required_builds:
           min_rust_version: << pipeline.parameters.min_rust_version >>
       - toolkit/optional_builds:
-          min_rust_version: << pipeline.parameters.min_rust_version >>
           filters:
             branches:
               ignore: main
-      - toolkit/test_doc_build:
-          min_rust_version: << pipeline.parameters.min_rust_version >>
+      - toolkit/test_doc_build
       - toolkit/idiomatic_rust:
-          min_rust_version: << pipeline.parameters.min_rust_version >>
           lint_flags: "-A deprecated"
           filters:
             branches:
               ignore: main
-      - toolkit/common_tests_rolling:
+      - toolkit/common_tests:
           min_rust_version: << pipeline.parameters.min_rust_version >>
           cargo_all_features: false
           cache_version: "v2"
@@ -149,7 +146,6 @@ workflows:
                 - /pull\/[0-9]+/
                 - main
       - toolkit/code_coverage:
-          min_rust_version: << pipeline.parameters.min_rust_version >>
           package: hcaptcha
           filters:
             branches:
@@ -179,5 +175,5 @@ workflows:
             parameters:
               cargo_bin: [long_help, no_options, short_help, simple_captcha]
       - toolkit/test_wasm:
-          min_rust_version: << pipeline.parameters.min_rust_version >>
+          rust_version: << pipeline.parameters.min_rust_version >>
           wasm_test_path: crates/test-wasm

.circleci/release.yml

@@ -19,7 +19,7 @@ parameters:
     description: "Override workspace v* version (empty = nextsv auto-detect)"
 
 orbs:
-  toolkit: jerus-org/circleci-toolkit@4.9.5
+  toolkit: jerus-org/circleci-toolkit@6.0.0
 
 jobs:
   tools:

.circleci/update_prlog.yml

@@ -12,21 +12,19 @@ parameters:
     description: "If true, pcu is updated from its main github branch before running."
 
 orbs:
-  toolkit: jerus-org/circleci-toolkit@4.9.5
+  toolkit: jerus-org/circleci-toolkit@6.0.0
 
 workflows:
   update_prlog:
     jobs:
       - toolkit/update_prlog:
           name: update-prlog-on-main
           context: [release, bot-check, pcu-app]
-          min_rust_version: "1.88"
           target_branch: "main"
           pcu_from_merge: --from-merge
           update_pcu: << pipeline.parameters.update_pcu >>
           pcu_verbosity: "-vvv"
       - toolkit/label:
-          min_rust_version: "1.88"
           context: pcu-app
           requires:
             - update-prlog-on-main