⭐ v13: Convert Azure Defender dict values into resources (#6694)

* ⭐ Convert Azure Defender dict fields to typed resources

Replace all 10 untyped dict-returning defenderFor* fields with fully
typed MQL resources, matching the existing defenderForApis and
defenderCSPM pattern. Each resource exposes .enabled, .pricingTier,
and common pricing metadata (subPlan, enforce, deprecated,
freeTrialRemainingTime, enablementTime, inherited, inheritedFrom,
replacedBy, resourcesCoverageStatus).

Add typed extension sub-resources for both defenderCSPM and
defenderForContainers with name, isEnabled, additionalProperties,
operationStatusCode, and operationStatusMessage fields.

Add isEnabled and phone fields to securityContact.

Add unit tests for commonPricingArgs and argsFromContactProperties
helper functions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Document lazy-loading behavior on extensions() methods

Add comments to both DefenderCSPM and DefenderForContainers extensions()
methods explaining the intentional re-fetch of pricing data for lazy loading.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* 🐛 Fix defenderForContainers extensions as computed field

The extensions field was defined as a plain field instead of a computed
field (missing `()`), so the hand-written extensions() method was never
called. This matches the working defenderCSPM pattern.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* 🐛 Add nil guard for commonPricingArgs and simplify enablementTime

- Add nil check for props parameter to prevent panic if Properties is nil
- Simplify enablementTime assignment since llx.TimeDataPtr already handles nil
- Remove unused time import
- Add NilProperties test case for commonPricingArgs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add nil guards for Properties in extensions() methods

Prevent nil-pointer panics when cloudPosturePricing.Properties or
containersPricing.Properties is nil in the CSPM and Containers
extensions() methods.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* 🐛 Fix extension __id path and simplify commonPricingArgs nil guard

Use "/extension/" (singular) in buildExtensionResources to maintain
backward compatibility with the pre-existing CSPM extension cache keys.

Simplify the nil-props guard in commonPricingArgs by substituting an
empty PricingProperties struct, so all nil-safe field checks handle it
uniformly without duplicating zero-value assignments.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: tas50