chore(release): 1.15.0

[karlwaldman]

Bumps oilpriceapi/version.py and pyproject.toml to 1.15.0 and turns the populated [Unreleased] section into [1.15.0] - 2026-09-13 (a fresh empty [Unreleased] stays on top).

What ships (since v1.14.0)

• fix(ei): return the named collection EI methods promise ([P1][Coverage review] Reconcile existing Energy Intelligence resource envelopes with Rails responses #107, PR fix(ei): return the named collection EI methods promise (#107) #139)
• fix(config): refuse a scheme-less base_url so the origin guard stays real ([P3][bug] URL guard and retry hardening: raw ValueError escapes, scheme-less base_url no-ops the guard, jitter exceeds the 60s cap #123, PR fix(config): refuse a scheme-less base_url so the origin guard stays real (#123) #131)
• fix(url,retry,errors): typed errors, a real 60s cap, no status on a local refusal ([P3][bug] URL guard and retry hardening: raw ValueError escapes, scheme-less base_url no-ops the guard, jitter exceeds the 60s cap #123, PR fix(url,retry,errors): typed errors, a real 60s cap, no status on a local refusal (#123) #134)
• fix(transport): accept a successful empty 204 instead of raising ([P1][Review] Accept successful empty 204 responses instead of raising JSONDecodeError #103, PR fix(transport): accept a successful empty 204 instead of raising (#103) #137)
• fix(streaming): bound the ActionCable setup and repair the reconnect budget ([P2][Coverage review] Bound ActionCable setup and repair streaming cleanup/reconnect lifecycle #108, PR fix(streaming): bound the ActionCable setup and repair the reconnect lifecycle (#108) #135)
• fix(telemetry): stop blocking the caller and leaking the flush thread ([P2][Review] Delete redundant SDK telemetry transport if unused; otherwise stop its thread and blocking flush #105, PR fix(telemetry): stop blocking the caller and leaking the flush thread (#105) #133)
• fix(futures): stop answering a dated contract with the generic front-month slug ([P2][bug] normalize_futures_slug still strips trailing digits, so WTI2026 silently resolves to the generic wti contract #128, PR fix(futures): stop answering a dated contract with the generic front-month slug (#128) #136)
• fix(diesel): async client state fallback, uppercase both branches ([P3][bug] URL guard and retry hardening: raw ValueError escapes, scheme-less base_url no-ops the guard, jitter exceeds the 60s cap #123, PR fix(diesel): give the async client the state fallback, and uppercase both branches (#123) #138)
• chore: untrack committed developer virtualenv ([P3][Review] Delete tracked developer virtual-environment launchers #106, PR chore: untrack committed developer virtualenv (build-env/) [#106] #132)

Verification (local, this branch, fresh venv with [dev])

• import oilpriceapi; oilpriceapi.__version__ → 1.15.0
• pytest → 1229 passed, 3 failed, 63 skipped
• The 3 failures are tests/integration/test_demo_contract.py receiving 429 Too Many Requests from the live /v1/demo/prices endpoint — environmental, identical on main before this change
• No 1.14.0 left outside CHANGELOG

PyPI publish runs on the GitHub release event (publish.yml), after merge.

🤖 Generated with Claude Code

https://claude.ai/code/session_015ao5paex73xXvuM424Libo

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