fix(review): honor lower max-tools overrides

[DreamZhongJu]

Summary

Make review --max-tools apply validated positive values exactly.

On current main, values from 1 to 49 are normalized to 50, but the shared template loader only applies values greater than the template default of 100. As a result, values from 50 to 99 are accepted but silently ignored.

This change:

• keeps the template default when --max-tools is 0;
• applies validated positive review overrides exactly;
• preserves the existing minimum-value normalization;
• leaves the scan command behavior unchanged;
• records the effective value as max_tool_request_times in the run manifest;
• updates the corresponding CLI documentation and translations.

For example, review --max-tools 50 now uses 50 rounds instead of silently retaining 100.

Testing

• go test -race -count=1 ./...
• go test -p=1 -count=1 ./...
• go vet ./...
• go run scripts/verify-english-only.go

Fixes #935

Related: #936 was closed without being merged.

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