Add original project poem

[alexgduarte]

/claim #76

Summary

• Added POEM.md at the repository root.
• Wrote an original five-stanza poem specifically around FreelanceFlow's brief, proposal, review, and payout flow.

Creative decision

I used an observatory/star-chart metaphor to frame scoped freelance work as signals that become trustworthy only when tied to review evidence and payout traceability.

Validation

• Verified POEM.md exists at the repository root.
• Verified the poem has 5 stanzas, exceeding the 3-stanza minimum.
• Ran git diff --cached --check before commit.