The existing repairToolJson only handles YAML bullet lists (#2660).
Two additional malformation patterns from smaller models now cause
tool call failures and stuck retry loops:
1. XML parameter tags mixed into JSON values (#3403):
LLMs (especially Haiku-class) sometimes emit hybrid XML/JSON
syntax like <parameter name="X">value</parameter> inside
JSON string values. Add stripXmlParameterTags() to remove
the tags while preserving content.
2. Truncated numeric values (#3464):
Smaller models emit incomplete numbers like "exitCode": -,
or "durationMs": , when values are cut off mid-generation.
Add repairTruncatedNumbers() to replace these with 0.
Both repairs run before the existing YAML bullet repair phase.
The AJV validation layer (coerceTypes: true) then handles any
remaining string-to-number coercion.
Adds 13 new tests covering detection and repair for both patterns.
Closes#3464, closes#3403, addresses #3369
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