refactor: wave 4 - consolidate duplicates, centralize parsing, extract helpers

[jongio]

Wave 4: Refactoring

Issues Resolved

• code smell detection: findings for azd-app #274: Code smell detection (5 findings)
• architecture review: findings for azd-app #265: Architecture review (2 bounded findings addressed)

Code Smell Fixes (#274)

• Consolidate ServiceInfo: Reduced duplication across 5 files by importing from canonical \serviceinfo\ package
• Centralize azure.yaml parsing: Route callers through \service.ParseAzureYaml\ instead of independent \yaml.Unmarshal\ calls
• DetectedProjects struct: Replace 3-parameter data clump (
  odeProjects, \pythonProjects, \dotnetProjects) with a single struct
• Extract runReqsFix: Break 205-line function into \parseReqs, \checkPrerequisite, \�nsureDockerReq\ helpers
• Replace parallel switches: Convert \getServiceFilterColumn/\getMessageColumn\ parallel switch statements into a single \ ableConfig\ map

Architecture Fixes (#265, bounded scope)

• Extract shared conversion: Move duplicated \convertAzureLogLevelToService\ to \internal/common/loglevel.go\
• Remove global state: Make \cmdOrchestrator\ in \core.go\ injectable instead of package-level mutable

Deferred (too risky for automated changes)

• Breaking up god packages (service/, dashboard/)
• Adding interfaces to major abstractions
• Filesystem abstraction layer
• Full dashboard-service decoupling

Closes #274, #265