fix(gateway): guard bare int/float(os.getenv) in platform configs

[vanthinh6886]

Summary

Bare int(os.getenv(...)) and float(os.getenv(...)) calls across gateway platform configs crash with ValueError when env vars contain non-numeric strings. Replace with env_int()/env_float() from utils.py which catch ValueError/TypeError and fall back to defaults.

Follow-up to PR #48365 which fixed the HERMES_MAX_ITERATIONS call sites. This PR covers the remaining platform-specific config vars.

Changes

• gateway/config.py: WECOM_CALLBACK_PORT, BLUEBUBBLES_WEBHOOK_PORT
• gateway/platforms/email.py: EMAIL_IMAP_PORT, EMAIL_SMTP_PORT, EMAIL_POLL_INTERVAL
• gateway/platforms/feishu.py: 6 vars (dedup cache, batching delays, webhook port)
• gateway/platforms/telegram.py: MEDIA_BATCH_DELAY_SECONDS, WEBHOOK_PORT
• gateway/platforms/wecom.py: TEXT_BATCH_DELAY_SECONDS, TEXT_BATCH_SPLIT_DELAY_SECONDS

Test Plan

• python -c "from utils import env_int, env_float" imports OK
• All modified files pass lint check
• env_int/env_float return defaults for invalid/missing values

[alt-glitch]

Duplicate of #39113 — that PR (open) already guards every one of these platform-config call sites (gateway/config.py, email.py, feishu.py, telegram.py, wecom.py) with env_int/env_float, using the same mechanism. Follow-up to #48365; both are subsets of the comprehensive #39113.

[alaamohanad169-ship-it]

Note: This is NOT a duplicate of the prior closed PRs (#39113, #48365, #39113). The earlier PRs were closed because they were stale (far behind upstream main). This version has been cherry-picked onto the latest origin/main with a clean diff containing only the fix changes. No conflicts. CI green. Ready for review.

[kshitijk4poor]

Closing as superseded by #49558, which landed the canonical fix for this whole bug class.

#49558 adds env_float() alongside the existing env_int() in utils.py (the env_float helper was cherry-picked from this PR — @annguyenNous's authorship is preserved in the merge, commit 06ca1e998), then converts all 22 genuinely-unguarded first-party int/float(os.getenv()) sites across the gateway, agent, auth, and platform adapters to those canonical helpers.

We went with the utils.env_int/env_float route (the established house pattern, already imported in several modules) rather than per-module helpers or inline try/except, so every malformed-env crash site is now guarded through one shared implementation.

Thanks for spotting and driving the fix on this — it's all in main now via:
#49558