#3220 A log line with a closing brace but no opening brace prints the brace doubled

Problem

Text logged through escapeLogTemplate (src/infrastructure/logging/logger.ts) prints a closing brace doubled whenever the line has no opening brace. escapeLogTemplate doubles both braces, but LogTape only parses a message template that contains an opening brace; a template with none is emitted verbatim, so the doubled closing brace is never collapsed.

Found while triaging swamp-club#3149. Related to closed swamp-club#2453, which covered every brace doubling; this narrower case remains on 20261009.170507.0-sha.d8a46694.

Repro

An extension source file whose deno fmt diff has a line that is only a closing brace, then swamp extension push --dry-run:

[ERR] extension·push:     6 | +  methods: {},
[ERR] extension·push:     7 | +}};

deno printed line 7 as a single closing brace followed by a semicolon. Lines that also hold an opening brace print correctly.

Directly against LogTape, logger.info(template) gives:

• template of two closing braces only: printed as two closing braces (wrong, expected one)
• template of two opening then two closing braces: printed as one of each (correct)

Affected

Every caller of escapeLogTemplate: streamed process output in process_executor.ts, method_execution_service.ts, and the extension push, info and findings-report renderers.

Expected

A closing brace in logged text prints once, whether or not the line has an opening brace.