fix(sundb): preserve complete function source

[HandSonic]

Related issue

N/A - no matching issue was found.

Summary

SunDB function detail metadata read only the first row from ALL_SOURCE, truncating every multiline function body. The shared source query also had no line ordering. This change reads every source row and orders function/procedure source by LINE, preserving the existing newline-separated body format.

Affected surfaces

• Frontend / Web
• Backend / API / Storage
• Database plugin / Driver
• JCEF / Desktop packaging
• CI / Build / Release
• Documentation only

Verification

• Commands and results:
  • Red test returned only the first of two source rows.
  • Focused function source test: 1 passed.
  • SunDB module tests after rebase: 26 passed.
  • Plugin reactor package: succeeded.
  • Fork code and CodeQL checks: rerunning for the rebased head.
  • Merge-tree with upstream fix(sundb): return distinct procedure records #2807: passed.
• Manual verification: N/A - strict JDBC proxies supply ordered source rows and capture the generated SQL.
• UI evidence: N/A

Risk and compatibility

• Public API or stored data: No API or stored data changes.
• Database or driver compatibility: SunDB routine source queries only; source text is no longer truncated.
• Network, privacy, or security: N/A.
• Community / Local / Pro boundary: Shared Community SunDB plugin.
• Backward compatibility: Single-line bodies retain the same text plus trailing newline.

Reviewer map

• Start here: SUNDBMetaData.function and shared ALL_SOURCE_SQL.
• Failure condition: only the first source row is returned or rows are not ordered by LINE.
• Rollback or disable path: Revert commit f99a0980285bb2fa15ec70d1740aea404dff3e6d; no migration is required.

Contributor declaration

• I linked the Issue that defines this change.
• I tested the affected behavior and reported the actual results above.
• I did not include credentials, private data, or generated build output.
• I disclosed substantial AI assistance below, or this PR contains no substantial AI-generated code.

AI assistance: OpenAI Codex assisted with diagnosis, implementation, automated tests, verification, and adversarial review.