clireporter: add space after separator for IDE file link detection

[dansamsara]

Summary

• Add trailing space to the pipe separator in log output so IDEs can correctly parse filenames

Problem

When taskrunner outputs logs with filenames (e.g., from typecheck), the pipe separator immediately precedes the filename with no space:

     typecheck |go/src/samsaradev.io/api/foo.go:123:45 error message

This causes VS Code (and other IDEs) integrated terminals to interpret the | as part of the filename when using cmd+click to open files, resulting in a "file not found" dialog.

Solution

Add a trailing space to the separator: "|" → "| "

     typecheck | go/src/samsaradev.io/api/foo.go:123:45 error message

This allows IDEs to correctly detect and open the file path.

Testing

• Build passes
• Verified the output format in prefixedwriter.go - the separator is used directly in the format string with no additional spacing

Fixes: https://samsara.slack.com/archives/C02KRH25X2E/p1736197501140599

[coveralls]

Pull Request Test Coverage Report for Build 21689890501

Details

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 45.167%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
clireporter/cli.go	0	2	0.0%

Totals
Change from base Build 19178823281:	0.0%
Covered Lines:	944
Relevant Lines:	2090

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💛 - Coveralls

[dansamsara]

Closing - the issue is actually in the TUI border padding, not the clireporter separator. The fix needs to be in samsara-dev/backend's terminalui code instead.