Neo4j fix - serialize host_metadata

[cnnrshd]

Add "host_metadata" to the nested field serialization loop. Prior to this, I was getting Neo4j insertion failures, seemingly on cloud providers:

Neo.ClientError.Statement.TypeError: Property values can only be of primitive types or arrays thereof

The error looked like:

2026-04-24 13:06:16,306 [ERROR] bbot.modules.output.neo4j base.py:1738 Error inserting Neo4j nodes (label:DNS_NAME): {neo4j_code: Neo.ClientError.Statement.TypeError} {message: Property values can only be of primitive types or arrays thereof. Encountered: Map{1.1.1.1 -> Map{cloud_providers -> Map{microsoft -> Map{match -> String("ip"), types -> List{String("cloud")}}, github -> Map{match -> String("ip"), types -> List{String("cdn")}}}}, 1.1.1.2 -> Map{cloud_providers -> Map{microsoft -> Map{match -> String("ip"), types -> List{String("cloud")}}, github -> Map{match -> String("ip"), types -> List{String("cdn")}}}}}.} {gql_status: 22G03} {gql_status_description: error: data exception - invalid value type}

Verified that this fix works locally by cloning the branch on 3.0, patching the file, building a docker container, and running another scan.

[github-actions]

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✅ (cnnrshd)[https://github.com/cnnrshd]
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[cnnrshd]

I have read the CLA Document and I hereby sign the CLA

[TheTechromancer]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91%. Comparing base (45aa36c) to head (7d01014).
⚠️ Report is 9 commits behind head on dev.

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #3060   +/-   ##
=====================================
+ Coverage     91%     91%   +1%     
=====================================
  Files        437     437           
  Lines      37431   37431           
=====================================
+ Hits       33874   33880    +6     
+ Misses      3557    3551    -6     

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[TheTechromancer]

recheck