#16792: fix(skills): use subsystem logger instead of console.log for debug output

Fixes #16661 ## Problem src/agents/skills/workspace.ts uses raw console.log for debug output (lines 57, 62), polluting stdout on every message when skill filters are configured, regardless of log level settings. ## Solution Replace console.log with skillsLogger.verbose to respect configured log levels. ## Changes - Line 57: console.log → skillsLogger.verbose - Line 62: console.log → skillsLogger.verbose ## Impact - Debug output now respects log level configuration - No more stdout pollution in production - Messages only appear when verbose logging is enabled <!-- greptile_comment --> <h3>Greptile Summary</h3> Replaces raw `console.log` calls in `filterSkillEntries()` with `skillsLogger.verbose()` to respect configured log levels. However, the `SubsystemLogger` type does not expose a `verbose` method — its available methods are `trace`, `debug`, `info`, `warn`, `error`, `fatal`, and `raw`. This will throw a `TypeError` at runtime when skill filters are configured. As noted in previous review comments, `skillsLogger.debug()` should be used instead. <h3>Confidence Score: 1/5</h3> - This PR will crash at runtime — do not merge without fixing the method name. - The `SubsystemLogger` type defines `trace`, `debug`, `info`, `warn`, `error`, `fatal`, and `raw` methods — there is no `verbose` method. Both changed lines (57 and 62) call `skillsLogger.verbose()`, which will throw `TypeError: skillsLogger.verbose is not a function` at runtime whenever skill filters are configured. The fix is straightforward (use `debug` instead of `verbose`), but as-is this PR introduces a regression. - `src/agents/skills/workspace.ts` — both changed lines use a non-existent method _{Last reviewed commit: 4a99799} <!-- greptile_other_comments_section --> <!-- /greptile_comment -->