Initial server source import

openspec/changes/resolve-ambiguous-key-providers/tasks.md

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+## 1. Routing And Candidate Extraction
+
+- [x] 1.1 Extend provider evidence and persisted hints to include ZAI and weak-context generic-key ambiguity.
+- [x] 1.2 Route ambiguous findings to one deduplicated `provider_resolver` candidate while preserving direct strong-provider candidates.
+- [x] 1.3 Add bounded ZAI key formats and `ZaiGLM` service extraction.
+
+## 2. Resolver And ZAI Checker
+
+- [x] 2.1 Implement shared deterministic provider resolution with match, no-match, and retry outcomes.
+- [x] 2.2 Add the PostgreSQL `provider_resolver` checker and legacy ambiguous-candidate delegation.
+- [x] 2.3 Add the ZAI `/models` authentication checker with global/China endpoint and business-code classification.
+- [x] 2.4 Require a bounded ZAI generation/billing probe before assigning `VALID`, while preserving authenticated non-alive outcomes.
+- [x] 2.5 Pin the ZAI usability probe to `glm-5.2` without model-list fallback.
+
+## 3. Transactional Persistence And Runtime
+
+- [x] 3.1 Reassign a positively matched resolver candidate to the canonical provider credential during fenced completion.
+- [x] 3.2 Register resolver and ZAI services, capabilities, status projections, configuration, and lifecycle runtime behavior.
+
+## 4. Verification
+
+- [x] 4.1 Add extraction, route ordering, short-circuit, retry, ZAI classification, and service-reassignment regression tests.
+- [x] 4.2 Run targeted and existing keycheck/scanner test suites with bytecode writes disabled.
+- [x] 4.3 Restart the supervised runtime and verify READY status plus live resolver/ZAI queue behavior.
+- [x] 4.4 Add regression coverage for successful generation, no-balance, limited, restricted, and inconclusive ZAI probes.
+- [x] 4.5 Run the affected suites and verify the supervised runtime plus one live ZAI recheck.
+- [x] 4.6 Verify the fixed `glm-5.2` target with regression tests and one live recheck.