feat: Minor index error handling enhancement

[chandrasekharan-zipstack]

What

• Updated IndexingAPIError to return 500
• Added doc_name to logs sent to FE
• Updated ADAPTER_LLMW_MAX_POLLS=1000 (corresponds to 1500 max limit of LLM whisperer x 20s approx to process a page)

Can this PR break any existing features. If yes please list of possible items. If no please exaplin why. (PS: Admins do not merge the PR without this section filled)

• No, minor index error enhancements

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Checklist

I have read and understood the [Contribution Guidelines]().

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

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