fix(resolver): redact RPC credentials from readiness output

[emirykl]

Summary:

• Redact resolver EVM and Soroban readiness URLs to protocol and host, removing user info, path credentials, and query parameters.
• Sanitize URL-bearing RPC errors and coordinator diagnostics while preserving host and chain/ledger details.
• Add regression tests covering secret-bearing success and error URLs.

Test evidence:

• @oversync/resolver Vitest: 4 files, 57 tests passed.
• @oversync/sdk build passed.
• @oversync/resolver build passed.
• @oversync/resolver lint passed.
• git diff --check passed.
• Coordinator-wide tests were attempted but remain blocked by unrelated baseline failures (missing supertest/pino dependencies and an existing syntax error in coordinator/src/persistence/orders-repo.ts).

Fixes #233

Verification

• ``node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --filter @oversync/resolver test (57 passed)
• ``node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --filter @oversync/sdk build (passed)
• ``node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --filter @oversync/resolver build (passed)
• ``node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --filter @oversync/resolver lint (passed)
• ``git diff --check (passed)
• Coordinator test suite attempted; unrelated baseline failures documented in PR body

Diagnostics

Recovered command failures: /bin/zsh -lc 'COREPACK_HOME=/tmp/oversync-corepack pnpm install --frozen-lockfile --ignore-scripts' (1), /bin/zsh -lc 'COREPACK_HOME=/tmp/oversync-corepack pnpm@9.15.9 --version' (127), /bin/zsh -lc 'COREPACK_HOME=/tmp/oversync-corepack corepack prepare pnpm@9.15.9 --activate && COREPACK_HOME=/tmp/oversync-corepack pnpm --version && COREPACK_HOME=/tmp/oversync-corepack pnpm install --frozen-lockfile --ignore-scripts' (1), /bin/zsh -lc 'node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --version && node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs install --frozen-lockfile --ignore-scripts' (1), /bin/zsh -lc 'node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs install --lockfile=false --ignore-scripts' (1), /bin/zsh -lc 'node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --filter @oversync/resolver test --run' (1), /bin/zsh -lc 'node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --filter @oversync/resolver build' (2), /bin/zsh -lc 'node /tmp/oversync-corepack/v1/pnpm/9.15.9/bin/pnpm.cjs --filter @oversync/coordinator test' (1)

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