Fix: catch Exception instead of Throwable in suspend APIs to preserve coroutine cancellation

[Copilot]

All suspend functions in Altude.kt were catching Throwable, which also catches CancellationException — swallowing coroutine cancellation signals from withTimeout, scope cancellation, etc.

Changes

• Altude.kt: Replaced catch (e: Throwable) → catch (e: Exception) across all 13 suspend function catch blocks (send, sendBatch, createAccount, closeAccount, swap, swapUsingServerTransaction, quote, getHistory, getBalance, getAccountInfo, createSchema, attest, revokeAttestation)

// Before — swallows CancellationException, breaks cooperative cancellation
} catch (e: Throwable) {
    Result.failure(Exception(e.message ?: e.javaClass.simpleName, e))
}

// After — CancellationException propagates normally
} catch (e: Exception) {
    Result.failure(Exception(e.message ?: e.javaClass.simpleName, e))
}

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dl.google.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED -Xmx2048m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant -cp /home/REDACTED/.gradle/wrapper/dists/gradle-8.13-bin/5xuhj0ry160q40clulazy9h7d/gradle-8.13/lib/gradle-daemon-main-8.13.jar (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)