feat: add tower hamlets council scraper

[InertiaUK]

Summary

• New scraper for London Borough of Tower Hamlets (population ~310k)
• Uses AchieveForms (Granicus) form with Whitespace waste management backend
• Selenium-based: navigates iframe, enters postcode, selects address via JavaScript (avoids Selenium stale element issues with DOM rebuilds)
• Reads timeband data from hidden form fields (AM/PM collection windows)
• Works for timebanded daily-collection streets (covers most of Tower Hamlets)

Notes

• Tower Hamlets has two collection models: timebanded (daily) and weekly
• The council's online form only shows data for timebanded streets
• Non-timebanded weekly streets return no schedule data from the form

Test plan

• Tested with E14 0EG, house number 225 (East India Dock Road) - daily collection with AM/PM timebands
• Returns 7 days of daily collection dates with time windows
• End-to-end verified through Kepthouse API

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 8b486b06-9f7c-4771-b84f-fb7326ea1e6a

📥 Commits

Reviewing files that changed from the base of the PR and between 8ecf878 and 71694ce.

📒 Files selected for processing (2)

• uk_bin_collection/tests/input.json
• uk_bin_collection/uk_bin_collection/councils/TowerHamletsCouncil.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
1	1	0	0

View the top 1 failed test(s) by shortest run time

::uk_bin_collection.tests.step_defs.test_validate_council

Stack Traces | 0s run time

.../tests/step_defs/test_validate_council.py:24: in <module>
    @pytest.fixture(params=get_council_list())
.../tests/step_defs/test_validate_council.py:19: in get_council_list
    data = json.load(file)
.../usr/lib/python3.12/json/__init__.py:293: in load
    return loads(fp.read(),
<frozen codecs>:322: in decode
    ???
E   UnicodeDecodeError: 'utf-8' codec can't decode byte 0x97 in position 41488: invalid start byte

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