feat: Contexto Fiscal admin UI - reduces fiscal policy list to 3 real decisions

Adds an ADMIN-only "Contexto Fiscal" section to the Agent detail page: confirm/alter/clear the fiscal decisions
field_contract.resolve_product genuinely cannot derive from the ERP alone (icms_treatment, pis_cofins_profile,
entry_scope). Persists through the existing FiscalContextEntry table (the same one blocker_resolution already
writes operator answers into) - no new persistence model, no opaque JSON box. CSRF + RBAC + audit reuse the exact
mechanism already proven for /agents/{id}/features. Confirming or clearing flags every already-enriched product on
the installation for re-evaluation.

The list was reduced from 5 candidates to 3 by auditing real production data (Agent 2, 2026-09-27/28):
icms_rate/credit_rate and rounding were dropped - both proven NOT_APPLICABLE / ALREADY_DERIVED for this CRT=1
company from real field_contract dry-runs, not assumption. Real evidence surfaced in the UI is a dated, one-time
manual read-only measurement (disclosed in the card copy itself as such) - the Hub has no direct Firebird access,
so this is not a live query; a follow-up should pipe it through the heartbeat the same way CRT/CONTRIBUINTE_IPI
were wired.

Also found, during the same audit, that this client's NFC-e emission ignores the product's cadastral PIS/COFINS
CST/rate fields entirely (verified on the 3 real products that DO have them populated - the emitted documents never
carry the cadastral value) - documented as a strong OPEN recommendation for a future field_contract change, not
applied here, since changing canonical fiscal semantics needs accountant sign-off, not just my own inference.

1129 tests passed (tests + central/tests + agent/tests), 0 failed. Version 1.3.9 (single GTI_FISCAL_VERSION). Hub
only - Agent unchanged, no new installer this release.

agent/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "gti-fiscal-agent"
-version = "1.3.8"
+version = "1.3.9"
 requires-python = ">=3.10"
 dependencies = ["httpx>=0.27,<1"]
 

agent/scripts/run_agent_service.py

@@ -107,7 +107,7 @@ class Config:
         self.poll_interval_seconds = float(env.get("POLL_INTERVAL_SECONDS", "5"))
         # RTC auto-apply is a SEPARATE switch (default OFF): FIREBIRD_WRITES alone never lets the Agent fill cClassTrib.
         self.rtc_auto_apply_max_per_job = int(env.get("RTC_AUTO_APPLY_MAX_PER_JOB", str(_rtc_apply.DEFAULT_MAX_PER_JOB)))
-        self.agent_version = env.get("AGENT_VERSION", "1.3.8")
+        self.agent_version = env.get("AGENT_VERSION", "1.3.9")
         self.schema_fingerprint = env.get("SCHEMA_FINGERPRINT", REFERENCE_SCHEMA_V1)
         self.state_db = env.get("AGENT_STATE_DB", str(AGENT_ROOT / "agent_state.sqlite"))
         # Pilot write authorization: both must be explicitly set by the installer for
@@ -356,7 +356,7 @@ def execute_job(job, config, executor, state, env):
             "fiscal_context": fiscal_context,
             "rtc_auto_apply": rtc_apply,
             "fiscal_mode": getattr(config, "fiscal_mode", None),
-            "release_version": env.get("AGENT_VERSION") or "1.3.8",
+            "release_version": env.get("AGENT_VERSION") or "1.3.9",
             "products_total": len(products),
             "products_changed": len(to_process),
             "products_processed": summary["processed"],
@@ -550,7 +550,7 @@ def run(config, env, *, max_iterations=None, stopper=None):
 def enforce_startup_preflight(env):
     """Full read-only preflight at startup (Hub, auth, Firebird, capabilities, company context, guards). Fail closed."""
     from gti_fiscal_agent.preflight import run_preflight
-    report = run_preflight(env, agent_version=env.get("AGENT_VERSION") or "1.3.8")
+    report = run_preflight(env, agent_version=env.get("AGENT_VERSION") or "1.3.9")
     logger.info("startup preflight: %s", json.dumps({k: report[k] for k in ("PREFLIGHT", "blockers", "fiscal_mode", "effective_firebird_writes")}, ensure_ascii=False))
     print(json.dumps({"PREFLIGHT": report["PREFLIGHT"], "blockers": report["blockers"]}, ensure_ascii=False))
     if report["PREFLIGHT"] != "PASS":

agent/src/gti_fiscal_agent/preflight.py

@@ -9,7 +9,7 @@ import os
 import sqlite3
 from pathlib import Path
 
-AGENT_VERSION_DEFAULT = "1.3.8"
+AGENT_VERSION_DEFAULT = "1.3.9"
 REQUIRED_ENV = ("GTI_HUB_URL", "AGENT_TOKEN", "FIREBIRD_DATABASE_PATH", "FB_USER", "FB_PASSWORD")
 REQUIRED_CAPABILITIES = ("supports_ncm", "supports_ipi", "supports_cest")
 FISCAL_MODES = ("DRY_RUN", "AUTO_APPLY")