enhancement: Show portfolio risk score based on bond ratings mix

[sshdopey]

Feature

Risk indicator (conservative/moderate/aggressive) based on holdings.

[Kureszn]

@Kureszn has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I've reviewed the issue and believe I can contribute effectively. My experience spans software development, blockchain technologies, cybersecurity and open source collaboration. I take a structured approach to contributions carefully understanding the existing codebase, identifying the root cause and delivering a thoroughly tested implementation.

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[laurentketterle-hub]

@laurentketterle-hub has applied to work on this issue as part of the Stellar Wave Program's 7th wave

[laurentketterle-hub]

@laurentketterle-hub has applied to work on this issue as part of the Stellar Wave Program's 7th wave

[laurentketterle-hub]

@laurentketterle-hub has applied to work on this issue as part of the Stellar Wave Program's 7th wave

[laurentketterle-hub]

@laurentketterle-hub has applied to work on this issue as part of the Stellar Wave Program's 7th wave

[laurentketterle-hub]

@laurentketterle-hub has applied to work on this issue as part of the Stellar Wave Program's 7th wave.