feat(rhdh-jira): incorporate COPE standup 5/14 decisions and process docs

[schultzp2020]

Summary

Incorporates decisions and process documentation from the COPE Standup on 5/14/2026 into the rhdh-jira skill.

Sources

• COPE Standup 5/14 Gemini notes, chat transcript, and meeting recording
• RHDHSUPP Engineering Process doc (content embedded, no URLs)
• RHDH Feature Exploration Process doc (content embedded, no URLs)

Changes

File	Change
SKILL.md	Added feature-exploration.md to reference_index; Gotchas #14 (Feature Exploration vs Refinement terminology) and #15 (candidate label protection)
references/support.md	Major expansion: full 8-step RHDHSUPP workflow, anti-pattern (don't comment on external tickets), reference resources list, security rules
references/feature-exploration.md	New file: Feature Exploration Process checklist with component validation, labels, Doc Epic automation, cross-team dependencies, rescoping
references/fields.md	Added quality label (code freeze exclusion), rhdh-testday label, candidate label protection, Component Validation section
references/to-feature.md	Added component inference, label prompts, Doc Epic automation, cross-team deps, rescoping caveat
references/to-epic.md	Added component validation, dependency linking, sizing caveats
references/refine.md	Added Check 7 (Feature Exploration Readiness) with freeze-aware label checks
references/acli-commands.md	Fixed test-day → rhdh-testday label
references/release.md	Fixed test-day → rhdh-testday label

Key Decisions Captured

• Feature Exploration is the correct meeting name (not Feature Refinement)
• quality label mandated for continuous improvement issues (excluded from code freeze queries)
• Don't comment on external support tickets — create internal RHDHSUPP issue instead
• Candidate labels (rhdh-X.Y-candidate) must not be removed without PM approval
• Component validation via Jira REST API during feature/epic creation and refinement

Security

• No internal URLs (Google Docs, Sheets, dashboards behind VPN/auth)
• No person names as process contacts (role titles only)
• No customer data or case numbers
• Slack channel names only (#rhdh-support, #rhdh-support-cases)

Verification

• 273 tests pass ✅
• All 34 referenced files exist ✅
• SKILL.md is 282 lines (under 500 limit) ✅
• Skill-maker expert agent audit: PASS WITH NOTES (all findings addressed)