fix(CODEWIKI-007-2): CU-86akn96pk web_app.py has no module-level logger; relies entirely on print()

[flamingo]

Closes findings from rule CODEWIKI-007-2 — web_app.py has no module-level logger; relies entirely on print().

Draft — this is a starting point, not a finished change. The fix required judgment, so read it before trusting it.

#	Fix confidence	Finding	Location
1	🟢 90 high	web_app.py has no module-level logger; relies entirely on print()	codewiki/src/fe/web_app.py:113

What changed — and what was deliberately left — is explained per finding as inline review comments on the lines each finding touched.

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Run: https://product-hub.flamingo.so/admin/code-review
Run id: 35794e5e-98a9-41e6-ac3b-f4c4c16f8e9d

Merging this PR is recorded as acceptance of the rule that produced it;
closing it unmerged is recorded as rejection. Both feed rule health, so
closing a wrong suggestion is useful rather than merely tidy.

ClickUp task: CU-86akn96pk CodeWiki review findings sweep (14 PRs)

[flamingo]

🦩 What this fix changed, finding by finding

1 finding(s) fixed in this draft — 1 explained inline on the diff.

[flamingo]

🦩 🟠 web_app.py has no module-level logger; relies entirely on print()

Added import logging and module-level logger = logging.getLogger(__name__) in codewiki/src/fe/web_app.py, and replaced all diagnostic print() calls in main() (startup banner, host/port, cache/temp directory paths, "Press Ctrl+C" message, and "Server stopped" on KeyboardInterrupt) with corresponding logger.info() calls, satisfying CODEWIKI-007-2's requirement for module-level logger-based diagnostics instead of print().

🤖 Prompt for AI agents

In codewiki/src/fe/web_app.py around line 113, review and complete this code-review fix: web_app.py has no module-level logger; relies entirely on print().
What the draft fix changed: Added `import logging` and module-level `logger = logging.getLogger(__name__)` in codewiki/src/fe/web_app.py, and replaced all diagnostic `print()` calls in `main()` (startup banner, host/port, cache/temp directory paths, "Press Ctrl+C" message, and "Server stopped" on KeyboardInterrupt) with corresponding `logger.info()` calls, satisfying CODEWIKI-007-2's requirement for module-level logger-based diagnostics instead of print().
Verify the change is correct and complete; do not refactor unrelated code.

fix confidence: 🟢 90 high — react 👍/👎 to teach the reviewer