CAMEL-23473: camel-jbang-mcp - drop verbose description from catalog list responses and lower default limit

[oscerd]

Summary

Slims down the four catalog list tools (CAMEL-23473). Each list response previously
included a multi-sentence description per item and could return up to 50 items. The LLM rarely
needs the description in a list — name + title are enough to decide what to drill into, and
the matching *_doc tool already carries the description.

Changes

• ComponentInfo, DataFormatInfo, LanguageInfo, EipInfo records: removed the description
  field. Mapping methods updated accordingly.
• camel_catalog_components and camel_catalog_dataformats default limit lowered from 50 to 20.
  camel_catalog_languages and camel_catalog_eips did not previously expose a limit argument
  and are left as-is.
• camel_catalog_components tool description updated to reflect the new payload shape and to
  point at camel_catalog_component_doc for descriptions.
• Upgrade-guide entry added under camel-jbang-mcp in camel-4x-upgrade-guide-4_21.adoc.

Test plan

• mvn -DskipTests install in dsl/camel-jbang/camel-jbang-mcp (formats + builds)
• mvn test in dsl/camel-jbang/camel-jbang-mcp — 255 tests pass, including 2 new ones:
  • listInfoRecordsCarryNoDescription (reflective check across all four list records)
  • defaultLimitCapsResultsAtTwenty (asserts default limit returns ≤ 20 items)
• componentInfoNullFieldsAreOmittedFromJson updated for the new ComponentInfo arity
• mvn clean install -DskipTests from repo root — full reactor build green, no uncommitted
  regenerated artifacts

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Claude Code on behalf of Andrea Cosentino

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🧪 CI tested the following changed modules:

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