Fix invalid escape sequence in listing synthesis engine

[JenR8ed]

Replaced the invalid escape sequence \{ in a regex inside services/listing_synthesis.py with { to avoid a SyntaxWarning in Python 3.12.

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PR created automatically by Jules for task 6895417259461118627 started by @JenR8ed

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
notion-unified-webhook	Ignored		Jul 11, 2026 10:36am

[gemini-code-assist]

Code Review

This pull request modifies a regular expression in services/listing_synthesis.py by removing the backslash escapes from curly braces. The reviewer correctly points out that curly braces are reserved metacharacters in regular expressions, and escaping them is standard practice to avoid ambiguity and maintain robustness. Reverting this change is recommended.

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[gemini-code-assist]

The original code used a raw string literal (r'...'), so \{ is not treated as an invalid Python escape sequence and does not trigger a SyntaxWarning in Python 3.12.

In regular expressions, { is a reserved metacharacter used for quantifiers (e.g., {m,n}). Although Python's re module currently falls back to treating { as a literal when it is not followed by a valid quantifier pattern, relying on this behavior is discouraged. Escaping it as \{ is the standard and robust way to match a literal { and avoids potential parsing ambiguity.

It is recommended to revert this change to keep the regex robust and clear.

Suggested change

	json_match = re.search(r'```(?:json)?\s*({.*?})\s*```', response_text, re.DOTALL)
	json_match = re.search(r'```(?:json)?\s*(\{.*?\})\s*```', response_text, re.DOTALL)