feat(quant): live quote contracts and reproducible daily research foundation

[Altairpaca]

Clausula's quant roadmap needs a separate data plane before minute data or native kernels can be useful. This initial slice adds exact live market contracts and a read-only quote service, plus immutable daily archives and three reference factors.

Implemented:

• Shared domain dataclasses and generated JSON Schema, explicit CN/HK symbol normalization, exact Decimal wire values, independent event/receive/query timestamps.
• Injected quote provider port, timeout budget propagation, late-result rejection, attempt provenance and process-local circuits.
• Experimental Tencent CN/HK quote adapter; unknown units/fields remain missing. One concrete upstream only.
• Independent capability registry and market quote/provider-health CLI, without financial Store creation.
• Optional PyArrow daily archive, raw hashes, exact decimal128 columns, atomic publication, immutable versions and integrity checks.
• CLI freeze/list/factor operations; return, momentum and sample volatility reference formulas with dataset/run lineage, warmup nulls and local knowledge cutoffs.

Validation:

• 30 targeted contract/archive/CLI/architecture tests pass locally.
• Baseline before changes: 230 pass, 3 fail because this host forbids bubblewrap namespaces. Existing isolation tests are unchanged; P2 architecture: single local daemon, authenticated identity, and isolated integrations #23 remains blocked here.
• Full regression excluding exactly those three baseline host tests is being rerun; CI installs quant extra and jsonschema.
• Live spot observations: hk02800 returned HTTP 200 once; sh563360 and a subsequent HK CLI call timed out. These are not MQF M5: live CN/HK ETF acceptance, CI contract tests and read-only MCP deployment #74 acceptance. Synthetic fixtures are not live evidence.

Limitations: source/license matrix, independent second provider, strict network cancellation, freshness-aware fallback, live daily adapter to archive, minute data, full factor registry/evaluation, MCP transport/Skill deployment and benchmarks/native code remain outstanding. Socket timeout is not a hard end-to-end deadline. Archive research mode is retrospective, not historical point-in-time reconstruction.

Related: #69 #70 #71 #72 #73 #74. This does not close those issues or merge #68/#75. See docs/adr/0008-ephemeral-market-query-contract.md and docs/project/QUANT_PROGRESS.md.

[Altairpaca]

Implementation/review evidence: initial full local regression 258 passed; exactly 3 pre-existing bubblewrap namespace tests were deselected after observing their baseline failures. Review fixes in 060a857 add fractional-second overlap and wrapped timeout tests: 32 focused tests pass. Wheel and sdist build passed locally. GitHub CI is being inspected on the updated head. This remains a Draft: only one experimental quote source, supplied canonical daily input for archive, and three reference formulas. Live-data reliability, licence audit, minute data, MCP deployment/Skill and native performance acceptance are not claimed.

[Altairpaca]

Final review follow-up 7e9d53e fixes a reproducibility issue: reference factor arithmetic now uses its own Decimal Context, including ROUND_HALF_EVEN, rather than inheriting the caller's rounding mode. A non-terminating-return fixture verifies invariance under low precision / ROUND_FLOOR. Latest focused suite: 33 passed. Remote CI is running on this exact head; earlier run outcomes do not substitute for this commit.

[Altairpaca]

Final-head CI verified: commit 7e9d53e, workflow https://github.com/Altairpaca/clausula/actions/runs/34731450741. Both Python 3.12 and 3.13 jobs completed successfully, including tests, compile, whitespace and wheel/sdist build. Local checkout matches this remote head and is clean. PR stays Draft because the wider programme and live acceptance remain incomplete; this green run does not waive #23/#34 or close #70–#74.