feat: add OpenLineage request logger extension

[mshahid6]

Description

Added extensions-contrib/openlineage-emitter as a contrib extension that uses the RequestLogger to transform and send lineage information to any OpenLineage-compatible API.
For SQL queries, the SQL text is parsed with the Calcite parser to extract input datasources (FROM clauses, JOINs, CTEs) and output datasources (INSERT INTO). For native queries, table names are read from DataSource.getTableNames(). Native sub-queries spawned by a SQL execution are deduplicated against the SQL-level event.
Each event includes standard OpenLineage facets (processing_engine, jobType, sql,errorMessage) and custom Druid facets (druid_query_context with user identity and query metadata, druid_query_statistics with duration and bytes).

Transport is configurable: CONSOLE (default) logs JSON to the Druid log; HTTP POSTs to an OpenLineage endpoint such as Marquez. Can be combined with other loggers via the composing provider.

This PR has:

• been self-reviewed.
• using the concurrency checklist (Remove this item if the PR doesn't have any relation to concurrency.)
• added documentation for new or modified features or behaviors.
• a release note entry in the PR description.
• added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
• added or updated version, license, or notice information in licenses.yaml
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold for code coverage is met.
• added integration tests.
• been tested in a test Druid cluster.

[FrankChen021]

Severity	Findings
P0	0
P1	0
P2	1
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Total	1

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This is an automated review by Codex GPT-5

[FrankChen021]

Severity	Findings
P0	0
P1	0
P2	1
P3	0
Total	1

---

This is an automated review by Codex GPT-5

[FrankChen021]

Severity	Findings
P0	0
P1	1
P2	0
P3	0
Total	1

Severity	Findings
P0	0
P1	1
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P3	0
Total	1

Reviewed 11 of 11 changed files.

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This is an automated review by Codex GPT-5.5

[FrankChen021]

Severity	Findings
P0	0
P1	0
P2	1
P3	0
Total	1

Reviewed 11 of 11 changed files.

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This is an automated review by Codex GPT-5.5

[FrankChen021]

Follow-up handled: the MSQ output extraction now uses DruidSqlParser, normalizes schema/catalog-prefixed datasource targets, skips EXTERN exports, and includes regression coverage for the cases raised.

Reviewed 11 of 11 changed files.

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This is an automated review by Codex GPT-5.5

[FrankChen021]

I have reviewed the code for correctness, edge cases, concurrency, and integration risks; no issues found.

Reviewed 13 of 13 changed files.

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This is an automated review by Codex GPT-5.5

[jtuglu1]

LGTM once CI is green