feat: add cases command group and additional v2.54.0 enhancements

[platinummonkey]

Summary

Additional enhancements building on PR #12, completing the v2.54.0 API client feature implementation. This PR adds the complex case management system and final polish including linting fixes and documentation updates.

Built on top of: #12 (merged)

🆕 New Features

Cases Command Group (618 lines) ✨

Complete case management system for tracking and resolving customer issues, bugs, and internal requests.

Case Operations:

• create - Create cases with title, type, priority (P1-P5), description
• get - Retrieve case details
• search - Search/filter cases with pagination
• archive / unarchive - Archive and reopen cases
• assign - Assign cases to users
• update-title - Modify case titles
• update-priority - Change case priorities

Project Operations:

• projects list - List all projects
• projects get - Get project details
• projects create - Create new projects with name and key
• projects delete - Delete projects with confirmation

Features:

• Priority system: P1 (Critical), P2 (High), P3 (Medium), P4 (Low), P5 (Lowest), NOT_DEFINED
• Search with filter, pagination, and sorting
• User assignment workflow
• Project-based organization
• Confirmation prompts for destructive operations

File: cmd/cases.go (618 lines)

🔧 Additional Improvements

Linting Fixes

• Removed unused findingsPageNumber variable from cmd/security.go
• All golangci-lint checks now passing (0 issues)

Documentation Updates

• Updated README.md API coverage: 33 → 37 command groups
• Updated coverage percentage: 38.8% → 43.5%
• Removed all "Blocked" statuses (7 commands unblocked)
• Updated all feature detail panes with current implementation status
• Updated API client version references: v2.30.0 → v2.54.0

📊 Final Statistics

Metric	Before PR #12	After This PR	Total Change
Command Groups	30	37	+7
Working Commands	26	34	+8
Blocked Commands	7	0	-7
Coverage %	35.3%	43.5%	+8.2%

📁 Files Changed

New Files (1)

• cmd/cases.go (618 lines) - Complete case management system

Modified Files (3)

• cmd/security.go (-1 line) - Removed unused variable
• cmd/root.go (+1 line) - Registered cases command
• docs/COMMANDS.md (+4 lines) - Added cases documentation
• README.md (~51 lines changed) - Updated all feature coverage sections

🎯 Command Examples

Cases Management

# Create a critical bug case
pup cases create --title="Production bug" --type-id="abc-123" --priority=P1 --description="Database connection failing"

# Search for bugs
pup cases search --query="bug" --page-size=20

# Assign to team member
pup cases assign case-123 --user-id="user-uuid"

# Update priority
pup cases update-priority case-123 --priority=P2

# Archive resolved case
pup cases archive case-123

# Project management
pup cases projects create --name="Customer Issues" --key="CUST"
pup cases projects list

✅ Testing Checklist

• All commands compile without errors
• Help text displays correctly for all commands
• Command hierarchy properly structured
• Required flags are enforced
• Confirmation prompts work for destructive operations
• --yes flag skips confirmations
• --output flag supports json/yaml/table formats
• All linting checks pass (golangci-lint: 0 issues)
• Documentation is comprehensive and accurate
• README.md feature coverage updated

🎊 Impact

Completes v2.54.0 Implementation:

• ✅ All 4 new command groups implemented (app-keys, cost, product-analytics, cases)
• ✅ All 6 command enhancements completed
• ✅ All 7 blocked commands unblocked
• ✅ 100% code quality (0 linting issues)
• ✅ Documentation fully updated

User Benefits:

• Complete case management for issue tracking
• Organized case workflows with projects
• Priority-based case management (P1-P5)
• Search and filter capabilities
• User assignment and collaboration
• Consistent CLI patterns across all commands

🔗 Related

• Builds on: feat(commands): implement new command groups from API client v2.54.0 #12 (merged)
• Depends on: chore(deps): bump the all group with 2 updates #9 (datadog-api-client-go v2.54.0 upgrade)
• Completes implementation from: datadog-api-client-go v2.54.0 changelog

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🤖 Generated with Claude Code

[github-actions]

📊 Test Coverage Report

Overall Coverage: 75.4%

Threshold: 80% ❌

Coverage by Package

## Coverage by Package

- github.com/DataDog/pup/pkg/auth/callback/server.go:40: 81.2%
- github.com/DataDog/pup/pkg/auth/dcr/client.go:28: 100.0%
- github.com/DataDog/pup/pkg/auth/dcr/types.go:24: 100.0%
- github.com/DataDog/pup/pkg/auth/oauth/client.go:22: 100.0%
- github.com/DataDog/pup/pkg/auth/oauth/pkce.go:24: 85.7%
- github.com/DataDog/pup/pkg/auth/storage/factory.go:53: 94.7%
- github.com/DataDog/pup/pkg/auth/storage/keychain.go:44: 42.9%
- github.com/DataDog/pup/pkg/auth/storage/storage.go:58: 71.4%
- github.com/DataDog/pup/pkg/auth/types/types.go:23: 100.0%
- github.com/DataDog/pup/pkg/client/client.go:31: 94.1%
- github.com/DataDog/pup/pkg/config/config.go:22: 100.0%
- github.com/DataDog/pup/pkg/formatter/formatter.go:31: 100.0%
- github.com/DataDog/pup/pkg/util/time.go:20: 95.8%

## Summary

total:								(statements)		75.4%

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📈 Coverage Status: ❌ FAILED - Coverage below minimum threshold

_{Updated for commit 056b055}