[dumians]

Description

fix: #2044 add support for executing Oracle PL/SQL blocks via RunSQL - Oracle raises error when the query uses "RETURN" keyword.

fix: #3389 Update the mutating os.Setenv block and passed configDir directly to the godror driver connection string. This ensures thread safety and prevents lazy-connection-opening failures (ORA-12154).
Prebuilt list_tables Query: Replaced with NVL(:1, t.table_name) to bind the positional parameter exactly once, resolving parameter mismatches.
Documentation: Updated both source.md and prebuilt oracle.md to reflect the new configurations and added standard vs. wallet setup examples.

feat: add telemetry tracing and user-agent propagation to Oracle database connections

🛠️ Fixes #2044 #3389

[gemini-code-assist]

Code Review

This pull request introduces support for passwordless Oracle Wallet authentication (SEPS/External Authentication) and telemetry tracking, alongside PL/SQL block execution support. Specifically, it makes database credentials conditional when using the OCI driver with a wallet, configures the godror driver using configDir instead of manipulating environment variables, and injects user-agent telemetry into connections. Additionally, it enables PL/SQL block execution (BEGIN/DECLARE) and updates documentation, prebuilt configurations, and unit tests accordingly. There are no review comments to address, and the changes look solid.

[duwenxin99]

Can we separate the Open Telemetry support with the PL/SQL fix? The password auth fix is submitted in #3389 by a contributor so we'll move forward with that one, but feel free to leave comments on it. Thanks!

[dumians]

/gcbrun