hotfix(transcribe): add missing import random (#6022)

[beastoin]

Fixes NameError in production: name 'random' is not defined at transcribe.py:1514.

The _pusher_reconnect_loop (from PR #6030) uses random.random() for backoff jitter but the import random statement was missing. This causes the reconnect loop to crash immediately, preventing circuit breaker recovery.

One-line fix: add import random to the stdlib imports.

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by AI for @beastoin

[greptile-apps]

Greptile Summary

This is a one-line hotfix that adds the missing import random statement to backend/routers/transcribe.py, resolving a production NameError: name 'random' is not defined introduced by PR #6030's _pusher_reconnect_loop implementation.

• The random module is used at line 1515 for exponential-backoff jitter: delay *= 0.75 + random.random() * 0.5.
• Without this import, every reconnect attempt crashed immediately, preventing the circuit breaker from ever recovering a Pusher connection.
• The import is inserted in the correct alphabetical position among the stdlib imports (between os and struct), consistent with the file's existing style.

Confidence Score: 5/5

• Safe to merge — minimal one-line stdlib import fix with no side effects.
• The change adds a single, standard-library import that is unambiguously required by existing code. There is no risk of regression and it directly unblocks a broken production code path.
• No files require special attention.

Important Files Changed

Filename	Overview
backend/routers/transcribe.py	Adds the missing import random stdlib import; fixes the production NameError at line 1515 where random.random() is used for jitter in _pusher_reconnect_loop.

Sequence Diagram

sequenceDiagram
    participant RL as _pusher_reconnect_loop
    participant R as random (stdlib)
    participant P as Pusher Client

    RL->>RL: connection failure detected
    RL->>RL: compute base delay (exponential backoff)
    RL->>R: random.random() — jitter ±25%
    R-->>RL: float in [0.0, 1.0)
    RL->>RL: delay *= 0.75 + jitter * 0.5
    RL->>RL: asyncio.sleep(delay)
    RL->>P: attempt reconnect
    P-->>RL: success / failure

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