fix: resolve dry-run reporting bugs across multiple asset types

[ankita10119]

🔧 Changes

This PR fixes 5 dry-run bugs affecting accuracy and reliability of a0deploy import --dry-run output:

• Dry run reports no change when only a field inside an array item differs #1451 - Changes to fields inside array items (e.g. connections[0].assign_membership_on_login) were silently ignored. A path guard !/\[\d+\]/g/ was suppressing every diff message whose path contained an array index.
• Dry-run diff log renders array items as [object Object] #1452 - Diff log messages showed [object Object] when an object array item had no counterpart on the other side, because template literal interpolation was used directly on an object value.
• AUTH0_IGNORE_DRY_RUN_FIELDS is ignored by the databases and connections handlers #1450 - AUTH0_IGNORE_DRY_RUN_FIELDS config had no effect on databases. The databases handler passed this.ignoreDryRunFields (constructor-only) instead of this.getEffectiveIgnoreDryRunFields() (config-merged).
• Phantom DELETEs for included connections - filterIncluded/filterExcluded were applied in processChanges but not in dryRunChanges, so the dry-run reported DELETE for every connection outside AUTH0_INCLUDED_CONNECTIONS.
  • Identified while reviewing community PR fix: apply AUTH0_INCLUDED_CONNECTIONS on export #1442 (fix: apply AUTH0_INCLUDED_CONNECTIONS on export #1442), which fixed the same gap on the export path - this PR extends the fix to dry-run
• Null crash in calculateDryRunChanges - When getType() returns null (e.g. 403 or empty tenant), wrapping it in [null] caused downstream crashes. Guard changed to existing ? [existing] : [].

📚 References

• Fixes Dry run reports no change when only a field inside an array item differs #1451
• Fixes Dry-run diff log renders array items as [object Object] #1452
• Fixes AUTH0_IGNORE_DRY_RUN_FIELDS is ignored by the databases and connections handlers #1450

🔬 Testing

Manual E2E - a0deploy import --dry-run against a live tenant:

• Dry run reports no change when only a field inside an array item differs #1451: Modified an org's connections[0].assign_membership_on_login: false → true. Dry-run correctly reported the org as UPDATE. Before the fix, no UPDATE was reported.
• Dry-run diff log renders array items as [object Object] #1452: Verified getObjectDifferences output with a local array longer than remote. Message shows local:{"flag":2,"name":"b"} vs remote:undefined - no [object Object].
• Phantom DELETEs: Ran with AUTH0_INCLUDED_CONNECTIONS: ["google-oauth2"], only google-oauth2.json in input, 8 connections on tenant. Result: No changes detected - zero phantom DELETEs for the 7 excluded connections.
• AUTH0_IGNORE_DRY_RUN_FIELDS is ignored by the databases and connections handlers #1450: Added "AUTH0_IGNORE_DRY_RUN_FIELDS": {"databases": ["enabled_clients"]}. Database UPDATE count dropped from 5 to 1 - enabled_clients noise correctly suppressed.
• Null crash: Covered by unit test - all local assets classified as creates, no crash when existing is null

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.51%. Comparing base (a00a055) to head (3280a52).

Files with missing lines	Patch %	Lines
src/tools/auth0/handlers/connections.ts	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1462      +/-   ##
==========================================
- Coverage   80.51%   80.51%   -0.01%     
==========================================
  Files         163      163              
  Lines        7745     7749       +4     
  Branches     1721     1723       +2     
==========================================
+ Hits         6236     6239       +3     
  Misses        808      808              
- Partials      701      702       +1     

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