fix: address review issues in contribution infrastructure

- CODEOWNERS: use @snapotter-hq username instead of non-existent team
- PR template: use absolute URLs (relative links break in PR body)
- CLA: strengthen entity definition with successor/assignee clause
- CLA workflow: store signatures on dedicated branch, add owner to allowlist
- CONTRIBUTING: clarify approval means the "approved" label, reword CCLA
- Bug template: allow "running from source" for developer contributors

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -41,7 +41,7 @@ body:
     id: docker-setup
     attributes:
       label: Docker setup
-      description: Paste your `docker run` command or `docker-compose.yml` (remove any sensitive values).
+      description: Paste your `docker run` command or `docker-compose.yml` (remove any sensitive values). If running from source, write "running from source via pnpm dev".
       render: shell
     validations:
       required: true

.github/pull_request_template.md

@@ -15,8 +15,8 @@ Fixes #
 
 ## Checklist
 
-- [ ] I have read [CONTRIBUTING.md](../CONTRIBUTING.md)
-- [ ] I have signed the [CLA](../CLA.md) (the bot will prompt you if not)
+- [ ] I have read [CONTRIBUTING.md](https://github.com/snapotter-hq/snapotter/blob/main/CONTRIBUTING.md)
+- [ ] I have signed the [CLA](https://github.com/snapotter-hq/snapotter/blob/main/CLA.md) (the bot will prompt you if not)
 - [ ] My changes follow the project's code style (Biome passes)
 - [ ] I have added or updated tests for my changes
 - [ ] All existing tests pass locally (`pnpm test`)

.github/workflows/cla.yml

@@ -27,8 +27,8 @@ jobs:
         with:
           path-to-signatures: "signatures/cla.json"
           path-to-document: "https://github.com/snapotter-hq/snapotter/blob/main/CLA.md"
-          branch: "main"
-          allowlist: "dependabot[bot],renovate[bot],github-actions[bot],snapotter-bot"
+          branch: "cla-signatures"
+          allowlist: "snapotter-hq,dependabot[bot],renovate[bot],github-actions[bot],snapotter-bot"
           custom-notsigned-prcomment: |
             Thank you for your contribution! Before we can merge this PR, you need to sign our [Contributor License Agreement](https://github.com/snapotter-hq/snapotter/blob/main/CLA.md).