feat(custom_tools): URL encode path parameters and improve response handling

[gomessguii]

Fixes in Custom Tools

• Implemented URL encoding for path parameters to ensure only URL-safe characters are used.
• Added a fallback to plain text responses for non-JSON responses.

Summary by Sourcery

Implement URL encoding for HTTP tool path parameters and add fallback handling for non-JSON responses

New Features:

• URL-encode path parameter values to ensure URL-safe characters
• Fallback to plain-text content when HTTP responses are not valid JSON

[sourcery-ai]

Reviewer's Guide

Implements URL encoding for path parameters to ensure safe URLs and adds a fallback to return plain text content when JSON parsing of HTTP responses fails.

File-Level Changes

Change	Details	Files
URL encode path parameters	Imported urllib.parse module Applied urllib.parse.quote with safe='' to each path parameter before replacement	src/services/custom_tools.py
Improve response handling for non-JSON responses	Wrapped response.json() in try-except ValueError Returned response.text wrapped in a JSON object when parsing fails	src/services/custom_tools.py

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[gomessguii]

These fixes address issues that affected tools like Jina.ai, which uses plain text responses and may include unsafe characters in URLs.