Adds period_type TEXT NOT NULL DEFAULT 'unknown' to macro_indicator and
widens the PRIMARY KEY to (indicator_type, region, obs_date, period_type).
Before: yearly aggregate ('год'→obs_date YYYY-01-01) and Q1 ('I квартал'→
same date) shared the same PK slot → ON CONFLICT DO UPDATE made them
overwrite each other despite the in-memory dedup fix in #1687.
After: each EmissRow carries period_type from _emiss_period_granularity
('year'/'quarter'/'month'); DB ON CONFLICT targets include it, so
yearly+Q1 rows genuinely coexist.
Non-EMISS sources (CBR, rosstat open-data, domrf) use period_type='unknown'
(literal in SQL) — they are disambiguated by obs_date already, so the
wider PK is backward-compatible. All ON CONFLICT clauses in
cbr_macro_sync.py and rosstat_macro_sync.py updated accordingly.
Migration: 163_emiss_pk_period_type.sql (idempotent BEGIN/COMMIT).
Tests: 49 passed (emiss + rosstat suite), ruff clean, py_compile OK.
Closes the last #946 gap (СМР). Fetches «Индексы цен производителей на
строительную продукцию по РФ» from the OPEN Rosstat xlsx
(rosstat.gov.ru/storage/mediabank/Invest_ind_stroitel_MM-YYYY.xlsx),
parses the monthly «к предыдущему месяцу» section → macro_indicator
(indicator_type='construction_price_index', region='rf', monthly, %).
The reCAPTCHA-gated fedstat dataGrid.do path is DELIBERATELY NOT used —
the open Rosstat source needs no captcha. EMISS id=31108 documented as a
prod-only SDMX alternative (not wired).
URL is date-derived with bounded look-back (filename changes monthly;
_fetch_construction_latest walks current month back to 6, first 200 wins;
year-boundary handled, exhaustion raises, 404 breaks fast — no hang).
Wired into rosstat_macro_sync with per-source try/except (can't break
demography/income) + SAVEPOINT-per-row. None-not-0 on blank months.
33 tests (incl look-back + year-boundary + graceful), ruff clean.
Note: no construction-cost channel in macro_coefficient yet (demand-side
only) — series is ingested/available for future cost-side use + display.
Refs #946
