Require a canonical Issue owner before implementation

[KimGLee]

Owner Issue

Closes #165

Change

The ignored docs/ tree remains a local investigation inbox. This PR gives confirmed public work one canonical lifecycle owner instead of creating a second tracked defect ledger:

• adds a required Bug Issue Form for problem, evidence, scope, and system invariant;
• documents GitHub Issues as the owner after a finding is promoted;
• adds a PR template with a closing owner reference;
• adds a pull-request-only CI check that resolves every closing reference through the GitHub API;
• rejects missing references, PR numbers, mismatched objects, and closed Issues;
• keeps push and manual verification independent of Issue API state;
• retries transient API short reads and fails closed with a bounded diagnostic.

The local defect register was updated separately as an ignored investigation record; it is not included in this distribution PR.

Verification

• 8 issue-owner unit tests
• live API probe against open Issue Give confirmed defects a canonical Issue owner before implementation #165
• workflow_dispatch skip probe
• YAML parse of Issue Form and workflow
• make check
• git diff --check